Free Printable Nuclear Chemistry (H)

Free Printable Worksheets

Worksheets

Nuclear Chemistry (H)

Total questions: 54

Worksheet time: 3hrs 39mins

Name

Class

Date

1.

An isotope is a version of an element with the same number of protons but different number of (a) .

2.

Describe the structure of an alpha particle.

a)

a fast-moving electron

b)

2 protons and 2 neutrons

c)

a slow-moving neutron

d)

a hydrogen nucleus

3.

In alpha decay, the mass number...

a)

increases by 2

b)

decreases by 2

c)

increases by 4

d)

decreases by 4

4.

In alpha decay, the atomic number...

a)

increases by 2

b)

decreases by 2

c)

increases by 4

d)

decreases by 4

5.

The mass number of Neptunium (Np) is (a) .

6.

The atomic number of Neptunium (Np) is (a) .

7.

When does radioactive decay occur?

a)

When the nucleus of an isotope is unstable

b)

When the nucleus of an isotope is stable

c)

When the electrons of an isotope are spinning

d)

When the electrons of an isotope are shared with another isotope

8.

During Alpha decay the nucleus splits into ____ parts.

a)

two

b)

three

c)

four

9.

A helium nucleus with two protons and two neutrons is called a(n) ____.

a)

alpha particle

b)

electroscope

c)

beta particle

d)

gamma ray

10.

An alpha particle is sometimes written as

a)

⁴₂He

b)

⁰_-1e

c)

⁰₊₁e

d)

¹₀n

11.

What is the charge of an Alpha Particle?

a)

+2

b)

+4

c)

0

d)

-1

12.

Solve this equation for alpha decay.
²⁰⁹₈₅At = ___ + ⁴₂He

a)

²⁰⁵₈₃Bi

b)

²⁰⁹₈₆Rn

c)

²⁰⁷₈₁Tl

d)

²⁰⁸₈₅At

13.

Solve this equation for alpha decay.
²²⁶₈₈Ra = ___ + ⁴₂He

a)

²²²₈₆Rn

b)

²²⁶₈₉Ac

c)

²²⁴₈₄Po

d)

²²⁵₈₈Ra

14.

What is the product of the alpha decay of Gold-175?

a)

Ir-171

b)

Tl-179

c)

Au179

d)

Au171

15.

This is the correct equation for U-238 decay.

a)

true

b)

false

16.

This is the balanced equation for the decay of Rn-222.

a)

true

b)

false

17.

In Gamma decay what particle is emitted?

a)

Helium (He)

b)

Electron (e^-)

c)

Energy (Photon)

18.

In Beta decay what particle is emitted?

a)

Helium (He)

b)

Electron (e^-)

c)

Energy (Photon)

19.

What is the most dangerous form of radioactive decay?

a)

Alpha

b)

Beta

c)

Gamma

20.

Which form of radiation can be stopped by something as thin as a sheet of paper?

a)

Alpha

b)

Beta

c)

Gamma

21.

Identify the missing variable in the following reaction.

a)

b)

c)

22.

Identify the missing variable in the following reaction.

a)

b)

c)

23.

Identify the missing variable in the following reaction.

a)

b)

c)

24.

Identify the missing variable in the following reaction.

a)

b)

c)

25.

Identify the missing variable in the following reaction.

a)

b)

c)

d)

26.

Which identifies the correct type of decay and shows the correct formula for the reaction shown?

a)

b)

c)

d)

27.

How is the alpha particle written in a nuclear equation?

a)

⁴₂He

b)

²₄He

c)

⁰_-1e

d)

⁰₀γ

28.

Which type of nuclear radiation is being emitted here?

a)

Alpha

b)

beta

c)

gamma

d)

none

29.

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

a)

₈₃²⁰⁵Bi

b)

₈₆²⁰⁹Rn

c)

₈₁²⁰⁷Tl

d)

₈₅²⁰⁸At

30.

Gamma rays have

a)

no mass

b)

a huge mass

c)

a small mass

d)

an average mass

31.

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

a)

₄¹⁰Be

b)

₇¹⁴N

c)

₂¹⁰He

d)

₆¹³C

32.

During beta-particle emission, a neutron splits into a____________________.

a)

proton and electron

b)

neutron and electron

c)

neutron and proton

33.

Has the symbol

a)

Alpha

b)

Beta

c)

Gamma

34.

Has the symbol

a)

Alpha

b)

Beta

c)

Gamma

35.

Has the symbol

a)

Alpha

b)

Beta

c)

Gamma

36.

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

37.

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

38.

Uranium-238 decays into Thorium-234 by emitting .........

a)

an alpha particle

b)

a beta particle

c)

gamma rays

d)

visible light

39.

Radioactive materials have unstable...

a)

electrons

b)

protons

c)

nuclei

d)

neutrons

40.

Which process involves the joining of small nuclei?

a)

Beta decay

b)

Alpha decay

c)

Nuclear fission

d)

Nuclear fusion

41.

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

42.

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

a)

number of neutrons

b)

atomic number

c)

number of electrons

d)

mass number

43.

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

a)

50%

b)

25%

c)

12.5%

d)

6.25%

44.

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

a)

50%

b)

25%

c)

12.5%

d)

6.25%

45.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

46.

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

47.

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

48.

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

a)

1/2

b)

1/3

c)

1/16

d)

1/8

49.

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

50.

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

51.

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

52.

If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.

a)

1.25mg

b)

1.25g

c)

10g

d)

10mg

53.

What percentage of rubidium-87 atoms will be left after four half lives?

a)

25.0%

b)

12.5%

c)

6.25%

d)

3.125%

54.

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

a)

b)

c)

d)

100 %

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