Free Printable Nuclear Chem - do in conjunction with Regents Review Slides

1.

Nuclei of U-238 atoms are

Table N

a)

stable and spontaneously absorb alpha particles

b)

stable and spontaneously emit alpha particles

c)

unstable and spontaneously absorb alpha

particles

d)

unstable and spontaneously emit alpha

particles

2.

Which nuclear emission has the greatest penetrating power?

Great Being American!!!!

a)

Alpha

b)

Positron

c)

Beta

d)

Gamma

3.

The dating of geological formations is an example of a beneficial use of

a)

isomers

b)

electrolytes

c)

rradioactive nuclides

d)

ethers

4.

Given the balanced equation representing a reaction:

Which type of reaction is represented by this
equation?

a)

combustion

b)

saponification

c)

decomposition

d)

transmutation

5.

Given the equation representing a reaction where the masses are expressed in atomic mass units, which phrase describes this reaction?:

hydrogen-2 + hydrogen-1 → helium-3 + 8.814 x10^-16 kJ

2.014 102 u 1.007 825 u 3.016 029 u

a)

a chemical reaction and mass being converted to energy

b)

a chemical reaction and energy being converted to mass

c)

a nuclear reaction and mass being converted to energy

d)

a nuclear reaction and energy being converted to mass

6.

Energy is released during the fission of Pu-239

atoms as a result of the

a)

formation of covalent bonds

b)

conversion of matter to energy

c)

formation of ionic bonds

d)

conversion of energy to matter

7.

Atoms of I-131 spontaneously decay when the

a)

stable nuclei emit alpha particles

b)

stable nuclei emit beta particles

c)

unstable nuclei emit alpha particles

d)

unstable nuclei emit beta particles

8.

Which type of reaction releases the greatest amount of energy per mole of reactant?

a)

combustion

b)

decomposition

c)

nuclear fusion

d)

oxidation-reduction

9.

See image

a)

1

b)

2

c)

3

d)

4

10.

Polonium-210 occurs naturally, but is scarce. Polonium-210 is primarily used in devices designed to eliminate static electricity in machinery. It is also used in brushes to remove dust from camera lenses.

Polonium-210 can be created in the laboratory by bombarding bismuth-209 with neutrons to create bismuth-210. The bismuth-210 undergoes beta decay to produce polonium-210. Polonium-210 has a half-life of 138 days and undergoes alpha decay.

State one beneficial use of Po-210

a)

clean dust off of decices like camera lenses and eliminate static in machinery

b)

treat thyroid disease

c)

diagnose pancreatic cancer, which is hard to detect otherwise

d)

make nuclear waste

11.

Polonium-210 occurs naturally, but is scarce. Polonium-210 is primarily used in devices designed to eliminate static electricity in machinery. It is also used in brushes to remove dust from camera lenses.

Polonium-210 can be created in the laboratory by bombarding bismuth-209 with neutrons to create bismuth-210. The bismuth-210 undergoes beta decay to produce polonium-210. Polonium-210 has a half-life of 138 days and undergoes alpha decay.

Complete the nuclear equation in your answer booklet for the decay of Po-210, by
writing a notation for the missing product.

a)

U-235

b)

lead-206

c)

Pb-208

d)

Ra-228

12.

Polonium-210 occurs naturally, but is scarce. Polonium-210 is primarily used in devices designed to eliminate static electricity in machinery. It is also used in brushes to remove dust from camera lenses.

Polonium-210 can be created in the laboratory by bombarding bismuth-209 with neutrons to create bismuth-210. The bismuth-210 undergoes beta decay to produce polonium-210. Polonium-210 has a half-life of 138 days and undergoes alpha decay.

Determine the total mass of an original 28.0-milligram sample of Po-210 that remains unchanged after 414 days.

a)

12.5 mg

b)

31 mg

c)

3.5 mg

d)

.014 mg

13.

The stability of an isotope is related to its ratio of

a)

neutrons to positrons

b)

electrons to positrons

c)

neutrons to protons

d)

electrons to protons

14.

Which particle has the least mass?

a)

alpha particle

b)

beta particle

c)

neutron

d)

proton

15.

The use of uranium-238 to determine the age of a geological formation is a beneficial use of

a)

nuclear fusion

b)

nuclear fission

c)

radioactive isomers

d)

radioactive isotopes

16.

When a cobalt-59 atom is bombarded by a subatomic particle, a radioactive cobalt-60 atom is produced. After 21.084 years, 1.20 grams of an original sample of cobalt-60 produced remains unchanged.

Complete the nuclear equation by writing a notation for the missing particl

a)

b)

c)

d)

17.

When a cobalt-59 atom is bombarded by a subatomic particle, a radioactive cobalt-60 atom is produced. After 21.084 years, 1.20 grams of an original sample of cobalt-60 produced remains unchanged. Based on Table N, identify the decay mode of cobalt-60.

a)

b)

c)

d)

18.

When a cobalt-59 atom is bombarded by a subatomic particle, a radioactive cobalt-60 atom is produced. After 21.084 years, 1.20 grams of an original sample of cobalt-60 produced remains unchanged. Determine the mass of the original sample of cobalt-60 produced.

a)

9.6 g

b)

19.2 g

c)

25.3 g

d)

59.6 g

19.

Which phrase describes the decay modes and
the half-lives of K-37 and K-42?

You need to know how to solve problems more than any one answer...

a)

the same decay mode but different half-lives

b)

the same decay mode and the same half-life

c)

different decay modes and different half-lives

d)

different decay modes but the same half-life

20.

Which particle has a mass that is approximately equal to the mass of a proton?

a)

an alpha particle

b)

a beta particle

c)

a neutron

d)

positron

21.

see image

a)

1

b)

2

c)

3

d)

4

22.

In 1896, Antoine H. Becquerel discovered that a uranium compound could expose a photographic plate wrapped in heavy paper in the absence of light. It was shown that the uranium compound was spontaneously releasing particles and high-energy radiation. Further tests showed the emissions from the uranium that exposed the photographic plate were not deflected by charged plates.

Identify the highly penetrating radioactive emission that exposed the photographic plates. [1]

a)

b)

c)

d)

23.

In 1896, Antoine H. Becquerel discovered that a uranium compound could expose a photographic plate wrapped in heavy paper in the absence of light. It was shown that the uranium compound was spontaneously releasing particles and high-energy radiation. Further tests showed the emissions from the uranium that exposed the photographic plate were not deflected by charged plates. Complete the nuclear equation see image.

a)

U-236

b)

Th-234

c)

I-131

d)

Po-210

24.

In 1896, Antoine H. Becquerel discovered that a uranium compound could expose a photographic plate wrapped in heavy paper in the absence of light. It was shown that the uranium compound was spontaneously releasing particles and high-energy radiation. Further tests showed the emissions from the uranium that exposed the photographic plate were not deflected by charged plates. Determine the number of neutrons in Uranium-233

a)

119

b)

233

c)

141

d)

92

25.

Identify the type of nuclear reaction that occurs when an alpha or a beta particle is spontaneously emitted by a radioactive isotope. Select ALL that apply.

a)

radioactive decay

b)

nuclear decay

c)

transmutation

d)

natural transmutation

e)

decay

26.

Which emission will be released from an unstable Fe-53 nucleus?

a)

an alpha particle

b)

a beta particle

c)

a positron

d)

a proton

27.

What is a potential risk associated with radioactive isotopes?

a)

biological exposure

b)

curing of diseases

c)

industrial measurements

d)

tracing chemical processes

28.

Which net change occurs in both nuclear fission and nuclear fusion reactions?

a)

Mass is converted to energy.

b)

Energy is converted to mass.

c)

Small nuclei form a larger nucleus.

d)

A large nucleus forms smaller nuclei.

29.

Element 117, Uus, has been synthesized and has at least two isotopes, Uus-293 and Uus-294. Atoms of Uus-293 can be made by bombarding Bk-249 with Ca-48 in a reaction represented by the nuclear equation see image.

The Bk-249 has a half-life of 320. days, decays by beta emission, and also emits gamma rays.

Determine the fraction of Bk-249 that remains unchanged after 960. days.

a)

1/16th

b)

1/8th

c)

1/3

d)

1/2

30.

State, in terms of both protons and neutrons, why Uus-293 and Uus-294 are isotopes of the same element.

a)

Both atoms have 117 protons.
but 294-Uus has 177 neutrons and 293-Uus has 176 neutrons.

same number protons different number neutrons.

b)

Both atoms have the same number of neutrons, 177, but different numbers of protons, 293 and 294 respectively.

c)

Uus-293 has 176 protons and Uus-294 has 177 protons but each has 117 neutrons. same number of neutrons different number of protons.

d)

Uus-293 and Uus-294 have different numbers of neutrons AND different numbers of protons since they are radioactive.

31.

Complete the nuclear equation in your answer booklet for the alpha decay of Uus-294 by writing a notation for the missing product.

a)

290-Uup

b)

298-U

c)

290-Uus

d)

294-Uut

32.

In which type of nuclear reaction do two light nuclei combine to produce a heavier nucleus?

a)

positron emission

b)

gamma emission

c)

nuclear fission

d)

nuclear fusion

33.

Finish this equation

²⁰⁹₈₃Bi-->_{_______ +}²⁰⁵₈₁Tl

a)

⁴₂He

b)

⁰_-1e

c)

y

34.

What type of reaction is this?

a)

Fission

b)

Fusion

35.

The ratio of the mass of U-238 to the mass of Pb-206 can be used to

a)

diagnose thyroid disorders

b)

diagnose kidney function

c)

date geological formations

d)

date once-living things

36.

Which statement describes a benefit of fission?

a)

Fission produces nuclear power.

b)

Fission increases the possibility of nuclear
accidents.

c)

Fission increases the possibility of biological
exposure.

d)

Fission produces waste products that need
long-term storage.

37.

See image

a)

1

b)

2

c)

3

d)

4

38.

See image

a)

1

b)

2

c)

3

d)

4

39.

Which radioisotope undergoes beta decay and has a half-life of less than 1 minute?

a)

Fr-220

b)

K-42

c)

N-16

d)

P-32

40.

Which type of nuclear reaction involves the splitting of a heavy nucleus into lighter nuclei?

a)

Beta decay

b)

Alpha decay

c)

Nuclear fusion

d)

Nuclear fission

41.

Which radioactive emission consists of two protons and two neutrons?

a)

Gamma ray

b)

Positron

c)

Beta particle

d)

Alpha particle

42.

What is the main purpose of using C-14 in scientific studies?

a)

To diagnose thyroid disorders

b)

To date once-living organisms

c)

To treat cancer

d)

To generate nuclear power

43.

Which statement explains the energy term in this reaction?

a)

Mass is lost due to the conversion of energy to mass.

b)

Mass is gained due to the conversion of mass to energy.

c)

Mass is gained due to the conversion of energy to mass.

d)

Mass is lost due to the conversion of mass to energy.

44.

Which risk is related to the radioactive isotopes used to generate electricity?

a)

depletion of atmospheric ozone

b)

exposure to nuclear emissions

c)

depletion of fossil fuels

d)

exposure to acid rain

45.

Which symbol represents a nuclear emission with the greatest mass and the greatest ionizing power?

a)

α

b)

β−

c)

β+

d)

γ

46.

Which emission will be released from an unstable Fe-53 nucleus?

a)

a proton

b)

a positron

c)

an alpha particle

d)

a beta particle

47.

Which type of reaction releases the greatest amount of energy per kilogram of reactant?

a)

redox reaction

b)

fission reaction

c)

organic reaction

d)

acid-base reaction

48.

One potential benefit of nuclear fusion reactions is

a)

production of large amounts of energy

b)

production of radioactive waste materials

c)

uncontrolled chain reaction

d)

reactor meltdown

49.

Which statement describes a benefit of the nuclear reaction that occurs in a nuclear power plant?

a)

The power plant reaction can be used in dating geologic formations.

b)

Radioactive isotopes are stored for a very long time at the power plant site.

c)

Large amounts of water are needed to cool the nuclear reactor.

d)

A large amount of energy is produced from a small amount of a radioisotope.

50.

What fraction of an original sample of Iodine-131 remains unchanged after 24.063 days?

a)

1/2

b)

1/3

c)

1/4

d)

1/8

51.

This equation represents

a)

sublimation

b)

fusion

c)

fission

d)

condensation

52.

Based on Table N, uranium-238 and uranium-235 have different

a)

half-lives

b)

decay modes

c)

number of Electrons

d)

number of protons

53.

A change that converts an atom of one element to another element is called

a)

transmutation

b)

Neutralization

c)

sublimation

d)

oxidation

54.

Based on Table N, which particle is emitted by the radioactive decay of francium-220?

a)

a beta particle

b)

a positron

c)

an alpha particle

d)

a neutron

55.

Determining the age of a wooden beam from a sunken ship is an example of a beneficial use of

a)

Lewis structures

b)

polyatomic ions

c)

radioactive nuclides

d)

homogeneous mixture

56.

How many neutrons does this isotope of titanium have?

a)

48

b)

22

c)

26

d)

70

57.

What particle completes this reaction?

a)

⁴₂He

b)

⁰_-1e

c)

⁰₀Y

d)

¹⁷₈O

58.

What particle completes this reaction?

a)

⁴₂He

b)

⁰_-1e

c)

⁰₀Y

d)

¹⁷₈O

59.

What type of nuclear equation is this?

a)

fusion

b)

fission

c)

alpha decay

d)

beta decay

60.

What particle completes this reaction?

a)

⁴₂He

b)

⁰_-1e

c)

⁰₀γ

d)

¹⁷₈O

61.

If you begin with 40g of a radioactive substance. How many grams are left after 3 half-lives?

(a)

62.

You begin with 60g of a radioactive element. After 4 hours, there are 15 g left. What is the length of the half-life in hours?

(a)

63.

A substance has a half-life of 30 seconds. If you begin with a 400 g sample, how many grams are left 2 minutes later?

(a)

64.

What is the Half Life of this isotope?

a)

3 days

b)

5 days

c)

8 days

d)

10 days

65.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

66.

high-energy photons emitted by a radioisotope

a)

positron

b)

radioactivity

c)

alpha particle

d)

gamma radiation

e)

beta particle

67.

Which nuclear process if shown in the picture?

a)

alpha decay

b)

beta decay

c)

fusion

d)

fission

68.

Based on the graph, what is the half-life of iodine-131?

a)

32 days

b)

8 days

c)

16 days

d)

24 days

69.

Radioactive materials have unstable...

a)

electrons

b)

protons

c)

nuclei

d)

neutrons

70.

Has the highest penetrating power. Can penetrate our body. Even several cm thick of lead or several meters thick of concrete cannot stop all of it.

a)

Alpha

b)

Beta

c)

Gamma

71.

radiation detector that makes use of a gas-filled metal tube

a)

scintillation counter

b)

Geiger counter

c)

neutron moderation

d)

neutron absorption

e)

film badge

72.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

73.

What is radioactivity?

a)

An unstable atom releases energy to become stable

b)

A stable atom gains energy and becomes unstable

c)

When a bomb goes off.

d)

Negatively charged particles are emitted from the nucleus

74.

Which of the following is a type of ionizing radiation?

a)

Radio

b)

Microwaves

c)

Visible Light

d)

UV Rays

75.

After three half-lives, what fraction of the original radioactive isotope remains?

a)

1/16

b)

1/2

c)

1/4

d)

1/8

76.

What sort of shield will block alpha radiation?

a)

skin/paper

b)

aluminum

c)

thick lead/concrete

d)

all of the above

77.

The nuclear process that happens in stars.

a)

fusion

b)

fission

c)

combustion

d)

drop it like its hot

78.

What sort of shield will block gamma rays?

a)

skin/paper

b)

aluminum

c)

thick lead/concrete

d)

all of the above

79.

List the types of radiation from most to least penetrating.

a)

Alpha , Beta, Gamma

b)

Beta , Gamma , Alpha

c)

Gamma, Beta, Alpha

d)

Gamma, Alpha, Beta

80.

The conversion of atoms of one element to atoms of another element.

a)

Transmutation

b)

Transfiguration

c)

Transmissional

d)

Transnational

81.

Transmutations occur through natural spontaneous nuclear decay or artificially created transmutations.

a)

True

b)

False

82.

Artificial transmutations are performed by

a)

bombarding atomic nuclei with electrons.

b)

bombarding atomic nuclei with high energy protons, neutrons, or alpha particles.

c)

combining radioactive elements in a chemical reaction.

d)

Removing valence electrons from elements to create an ionic bond.

83.

As Americium-241 undergoes radioactive decay, it emits ______________ .

a)

Alpha radiation

b)

Beta radiation

c)

Gamma rays

d)

Ultraviolet rays

84.

What element is the ?

a)

Ag-115

b)

Cd-115

c)

Pd-115

d)

Not Listed

85.

The technetium-99 isotope has a half-life of 6.0 hours. If 100.0 mg were injected into a patient how much remains after 18 hours?

a)

33.0 mg

b)

12.5 mg

c)

.33 mg

d)

15.8 mg

86.

Classify this process.

a)

Nuclear fission

b)

Nuclear fusion

c)

Alpha decay

d)

Beta decay

87.

Nuclear power uses ____ for fuel.

a)

steel

b)

coal

c)

uranium

d)

hydrogen

88.

What is the process of transmutation in chemistry?

a)

The process of changing one element into another through chemical reactions.

b)

The process of changing one element into another through nuclear reactions.

c)

The process of changing one compound into another through physical reactions.

d)

The process of changing one substance into another through biological reactions.

89.

Has the lowest penetrating power. Can only penetrate 0.05 mm into the body and can be stopped by a piece of paper or clothing.

a)

Alpha

b)

Beta

c)

Gamma

90.

Radioactive materials have unstable...

a)

electrons

b)

protons

c)

nuclei

d)

neutrons

91.

What is the term used for describing when an element changes into a new element through radioactive decay?

a)

mutation

b)

transmutation

c)

alchemy

92.

Dating once-living organisms is an example of a beneficial use of

a)

organic isomers

b)

redox reactions

c)

neutralization reactions

d)

radioactive isotopes

93.

Which phrase describes a risk associated with producing energy in a nuclear power plant?

a)

depletion of atmospheric hydrogen (H₂)

b)

production of wastes needing long-term storage

c)

depletion of atmospheric carbon dioxide CO₂

d)

production of wastes that cool surrounding water supplies

94.

The stability of an isotope is related to its ratio of

a)

neutrons to positrons

b)

neutrons to protons

c)

electrons to positrons

d)

electrons to protons

95.

The energy released during a nuclear reaction is a result of

a)

breaking chemical bonds

b)

forming chemical bonds

c)

energy being converted to mass

d)

mass being converted to energy

96.

The use of uranium-238 to determine the age of a geological formation is a beneficial use of

a)

nuclear fusion

b)

nuclear fission

c)

radioactive isomers

d)

radioactive isotopes

97.

What is the mass of an original 5.60-gram sample of iron-53 that remains unchanged after 25.53 minutes?

a)

0.35 g

b)

0.70 g

c)

1.40 g

d)

2.80 g

98.

Fission and fusion reactions both release energy. However, only fusion reactions

a)

create radioactive products

b)

use radioactive reactants

c)

require elements with large atomic numbers

d)

combine light nuclei

99.

In the equation,^14₆C --> ^14₇N + ^0_-1B, the _______ decay of radioactive carbon-14 results in the creation of a new nitrogen-14 atom.

a)

Radioactive

b)

Beta

c)

Alpha

d)

Gamma

100.

Which type of nuclear radiation is being emitted here?

a)

Alpha

b)

beta

c)

gamma

d)

none

101.

Complete the nuclear equation and determine the type of decay that is occurring in this reaction.

a)

alpha

b)

beta

c)

gamma

d)

none

102.

Solve this equation for alpha decay.

₈₅²⁰⁹At --> ___ + ₂⁴He

a)

₈₃²⁰⁵Bi

b)

₈₆²⁰⁹Rn

c)

₈₁²⁰⁷Tl

d)

₈₅²⁰⁸At

103.

Balance the following equation:
¹⁴₆C --> ⁰_-1e + ________

a)

¹⁴₅B

b)

¹⁴₆C

c)

¹⁴₇N

d)

⁴₂He

104.

Gamma rays have

a)

no mass

b)

a huge mass

c)

a small mass

d)

an average mass

105.

Solve this equation for beta decay.

₆¹⁴C --> ___ + _-1⁰e

a)

₄¹⁰Be

b)

₇¹⁴N

c)

₂¹⁰He

d)

₆¹³C

106.

Carbon-14 has a half life of 5730 years, how many years would it take the 4.0 g sample to decay to 0.25 g?

a)

4 years

b)

5730 years

c)

22,920 years

d)

28,650 years

107.

An isotope of silver has a half-life of 10 minutes. What fraction of the original mass would remain after one hour?

a)

1/64

b)

1/2

c)

1/4

d)

1/8

108.

A radioactive substance decays with a half-life of 12,000 years. If the substance is stored for 36,000 years, then what fraction of it remains?

a)

1/2

b)

1/8

c)

1/24

d)

1/64

109.

An isotope of cesium (cesium-137) has a half-life of 30 years. If 1.0 mg of cesium-137 disintegrates over a period of 90 years, how many mg of cesium-137 would remain?

a)

0.5 mg

b)

0.25 mg

c)

0.125 mg

d)

0.0625 mg

110.

A 2.5 gram sample of an isotope of strontium-90 was formed in a 1960 explosion of an atomic bomb at Johnson Island in the Pacific Test Site. The half-life of strontium-90 is 28 years. In what year will only 0.625 grams of this strontium-90 remain?

a)

1988

b)

2016

c)

2044

d)

2072

111.

A 2.5 gram sample of an isotope of strontium-90 was formed in a 1960 explosion of an atomic bomb at Johnson Island in the Pacific Test Site. The half-life of strontium-90 is 28 years. In what year will only 0.625 grams of this strontium-90 remain?

a)

1988

b)

2016

c)

2044

d)

2072

112.

What is Half-life?

a)

The amount of time it takes for some of the nuclei in a sample of the isotope to decay

b)

The amount of time it takes for half the electrons in a sample of the isotope to decay

c)

The amount of time it takes for half the nuclei in a sample of the isotope to decay

d)

the amount of time it takes to double the nuclei in a sample of the isotope to decay

113.

What makes an element radioactive?

a)

When it's nuclei expands

b)

When it's electrons explode

c)

When it's nuclei behave

d)

When it's nuclei decay

114.

When nuclei decay, massive amounts of __________ is released.

a)

energy

b)

jello

c)

protons

d)

neutrons

115.

What is the only difference between two different isotopes of the same element?

a)

Number of neutrons

b)

Number of protons

c)

Number of electrons

d)

Size of atom

116.

After the third half-life, how much of the sample is left?

a)

1/2

b)

1/3

c)

1/16

d)

1/8

117.

If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?

a)

1 half-life

b)

2 half-lives

c)

3 half-lives

d)

4 half-lives

118.

The half-life of Zn-71 is 2.4 minutes. Starting with 100.0 g, how many grams would remain after 4.8 minutes (2 half-lives)?

a)

100.0 g

b)

50.0 g

c)

25.0 g

d)

8.5 g

119.

Solve this equation for alpha decay.
₈₅²⁰⁹At = ___ + ₂⁴He

a)

₈₃²⁰⁵Bi

b)

₈₆²⁰⁹Rn

c)

₈₁²⁰⁷Tl

d)

₈₅²⁰⁸At

120.

Solve this equation for beta decay.
₆¹⁴C = ___ + _-1⁰e

a)

₄¹⁰Be

b)

₇¹⁴N

c)

₂¹⁰He

d)

₆¹³C

121.

Has the lowest penetrating power. Can only penetrate 0.05 mm into the body and can be stopped by a piece of paper or clothing.

a)

Alpha

b)

Beta

c)

Gamma

122.

Has the highest penetrating power. Can penetrate our body. Even several cm thick of lead or several meters thick of concrete cannot stop all of it.

a)

Alpha

b)

Beta

c)

Gamma

123.

In a correctly written symbol what would be located in the "A" position?

a)

number of neutrons

b)

atomic number

c)

number of electrons

d)

mass number

124.

¹⁸⁵₇₉Au —› ____ + ⁴₂He

a)

¹⁸⁵₈₀Hg

b)

¹⁸⁷₇₅Re

c)

¹⁸¹₇₇Ir

d)

⁷⁹₃₄Se

125.

¹³⁷₅₅Cs —› ____ + ⁰_-1e

a)

¹⁷⁸₇₂Hf

b)

¹³⁷₅₃I

c)

¹⁴¹₅₄Xe

d)

¹³⁷₅₆Ba

126.

²²⁰₈₇Fr —› ____ + ⁴₂He

a)

²²⁰₈₉Ac

b)

²²⁴₉₀Th

c)

²¹⁶₈₅At

d)

²¹⁶₈₈Ra

127.

³²₁₅P—› ____ + ⁰_-1e

a)

³²₁₆S

b)

³²₁₄Si

c)

¹⁶₃₂S

d)

³⁴₁₇Cl

128.

What is Half-life?

a)

The amount of time it takes for some of the nuclei in a sample of the isotope to decay

b)

The amount of time it takes for half the electrons in a sample of the isotope to decay

c)

The amount of time it takes for half the nuclei in a sample of the isotope to decay

d)

the amount of time it takes to double the nuclei in a sample of the isotope to decay

129.

The % of the parent isotope remaining after 1 Half Life.

a)

50%

b)

25%

c)

12.5%

d)

6.25%

130.

The diagram shows 32 atoms.

16 of the Red are parent isotopes

16 of the Green are daughter isotopes

How many half-lives have occurred?

a)

0

b)

1

c)

2

d)

3

131.

The % of the parent isotope remaining after 2 Half Lives.

a)

50%

b)

25%

c)

12.5%

d)

6.25%

132.

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

a)

3.0g

b)

0.5g

c)

0.3g

d)

0.25g

133.

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?

a)

100.0g

b)

50.0g

c)

12.5g

d)

8.5g

134.

After the third half-life, how much of a radioactive sample is left?

a)

1/2

b)

1/3

c)

1/16

d)

1/8

135.

The half life of iodine-131 is 8 days. What fraction of an iodine-131 sample will remain after 40 days?

a)

1/2

b)

1/64

c)

1/5

d)

1/32

136.

As a sample of Neon-19 undergoes radioactive decay, its half-life will

a)

decrease

b)

increase

c)

remain the same

d)

start over

137.

Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?

a)

0.25g

b)

2.5g

c)

25g

d)

80g

138.

When nuclei decay, massive amounts of __________ is released.

a)

energy

b)

electrons

c)

protons

d)

neutrons

139.

If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?

a)

1 half-life

b)

2 half-lives

c)

3 half-lives

d)

4 half-lives

140.

The half-life of a radioactive isotope is not effected by which of the following?

a)

Temperature

b)

Pressure

c)

Concentration

d)

None of these will effect the rate of a nuclear reaction

141.

After 4 half-lives, 1g of a sample of Krypton-85 remains unchanged. What was the original mass of the sample?

a)

16g

b)

32g

c)

0.0625g

d)

4g

142.

What type of decay is being illustrated in following picture?

a)

beta decay

b)

alpha decay

143.

You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years.
How many grams are left after 1 half life?

a)

100 grams

b)

25 grams

c)

2 grams

d)

50 grams

144.

What is the Half Life of this isotope?

a)

3 days

b)

5 days

c)

8 days

d)

10 days

145.

The Half Life of Californium 252 is 5 years.

a)

TRUE

b)

FALSE

146.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

147.

The diagram shows 32 atoms

8 of the Red are parent isotopes

24 of the Green are daughter isotopes

How many half-lives have occurred?

a)

0

b)

1

c)

2

d)

3

148.

The diagram shows 32 atoms

32 of the Red are the parent isotope

0 of the atoms are daughter isotopes

How many half-lives have occurred?

a)

0

b)

1

c)

2

d)

3

149.

Which diagram best represents the percentage of this radioactive isotope sample that will remain after 2 half-lives?

a)

b)

c)

d)

150.

A sample of wood that originally contained 100 grams of carbon-14 now contains only 25 grams of carbon-14. Approximately how many years ago was this sample part of a living tree?

a)

2,850 years

b)

5,700 years

c)

11,400 years

d)

17,100 years

151.

A bone sample contains only 1/4 of its original radioactive C¹⁴ content. How old is the bone sample?

a)

1 C¹⁴ half-life

b)

2 C¹⁴ half-lives

c)

3 C¹⁴ half-lives

d)

4 C¹⁴ half-lives

152.

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

a)

3.0g

b)

0.25mg

c)

0.3g

d)

0.25g

153.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

154.

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

a)

3.0g

b)

0.25mg

c)

0.3g

d)

0.25g

155.

If one-fourth of the carbon-14 is remaining then how many half-lives have passed?

a)

1

b)

2

c)

3

d)

4

156.

Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?

a)

0.25g

b)

2.5g

c)

25g

d)

80g

157.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

158.

You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years.
How many grams are left after 1 half life?

a)

100 grams

b)

25 grams

c)

2 grams

d)

50 grams

159.

If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?

a)

1 half-life

b)

2 half-lives

c)

3 half-lives

d)

4 half-lives

160.

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

a)

3.0g

b)

0.25mg

c)

0.3g

d)

0.25g

161.

An Isotope of Cesium-137 has a half life of 30 years. If 1.0 g of Cesium-137 disintegrates over a period of 90 years, how many grams of Cesium-137 would remain?

a)

.125 grams

b)

45 grams

c)

.5 grams

d)

15 grams

162.

Actinium-226 has a half life of 29 hours. If 100 milligrams of Actinium disintegrate over a period of 58 hours, how many milligrams of Actinium will remain?

a)

100 mg

b)

50 mg

c)

25 mg

d)

58 mg

163.

Selenium-83 has a half life of 25 minutes. How many minutes would it take for a 20 milligram sample to decay and only have 1.25 milligrams of it remaining?

a)

25 minutes

b)

50 minutes

c)

75 minutes

d)

100 minutes

164.

What is the half life of Polonium-218 if 0.0625 grams remains of a 2.00 gram original sample after 15 minutes?

a)

5 minutes

b)

3 minutes

c)

15 minutes

d)

7.5 min

165.

Imagine you have 50,000 atoms of uranium-238. If U-238 has a half-life of 4.5 billion years, how many U-238 atoms will be left after 4.5 billion years?

a)

25,000

b)

50,000

c)

12,500

d)

0

166.

This image shows

a)

Nuclear fission

b)

Nuclear fusion

167.

How much of a 250g sample would be left after 5 half lives?

a)

125g

b)

62.5g

c)

31.25g

d)

15.63g

Nuclear Chem - do in conjunction with Regents Review Slides

Total questions: 167

Worksheet time: 8hrs 21mins

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