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radioactivity

Total questions: 81

Worksheet time: 1hrs 21mins

Name
Class
Date
1.
The rate at which a radioactive element decays is its ____.
a)
quarter life
b)
whole life
c)
wonderful life 
d)
half life
2.
Energy in the sun is produced as a result of nuclear ____ reactions.
a)
fusion
b)
fission
c)
waste
d)
sub
3.
The three types of nuclear radiation in order of increasing penetrating power are
a)
alpha, beta, gamma
b)
alpha, gamma, beta
c)
beta, alpha, gamma
d)
gamma, alpha, beta
4.

The process by which nuclei having small masses are combined to form a single larger nucleus is called nuclear ____.

a)

fusion

b)

fission

c)

reactivity

d)

waste

5.
Name the type of radioactive particle that can be stopped by a sheet of paper.
a)
alpha
b)
beta
c)
gamma
d)
lambda
6.
Name the most penetrating type of radiation.
a)
alpha
b)
beta
c)
gamma
d)
lambda
7.
What makes something radioactive?
a)
elements with an atomic number above 81
b)
an unstable nucleus
c)
contaminated sewage
d)
It decays over time
8.
If the half life of a radioactive element is 100yrs, how long would it take for the radioactivity to reduce by one half?
a)
200yrs
b)
100yrs
c)
50yrs
d)
300yrs
9.
What is nuclear fission?
a)
Big nucleus splits to small nuclei
b)
Small nuclei fuse into a bigger nucleus
c)
Stars
d)
Making compounds
10.
_______________ is the process by which unstable atoms emit radiation until they become stable.
a)
Radiation
b)
Chemical Reaction
c)
Radioactive Decay
d)
Isotopes
11.
A benefit to using nuclear fission power is that it:
a)
supplies a lot of electricity
b)
conserves organic fuels, like oil, coal, and wood
c)
eliminates huge quantities of sulfur dioxides, which pollute our air
d)
all of the choices
12.
what's the half life of this substance?
a)
1 day
b)
2 days
c)
3 days
d)
4 days
13.
An isotope of an element has the same number of _________, but a different number of _________.
a)
Protons, electrons
b)
Protons, neutrons
c)
Electrons, neutrons
14.
What type of radioactive decay is shown here?
a)
Alpha decay
b)
Beta decay
c)
Gamma decay
15.
Which type of radiation releases an electron?
a)
Alpha radiation
b)
Beta radiation
c)
gamma radiation
16.
What particle is released when an unstable isotope undergoes alpha radiation?
a)
an helium nucleus
b)
an electron
c)
a photon of light
17.
Which is NOT a characteristic of gamma radiation?
a)
High energized photon of light
b)
Can be stopped by a sheet of aluminum foil
c)
Is the most harmful type of radiation to humans
d)
Our use of protection is concrete, or several inches of lead
18.
What type of decay is shown here
a)
alpha decay
b)
beta decay
c)
gamma decay
19.

What percent of an isotope will remain after 2 half lives?

a)

50%

b)

35%

c)

12.5%

d)

25%

20.

Which particle below will be attracted to negatively charged matter?

a)

alpha particle

b)

beta particle

c)

gamma ray

21.

Which particle below will be attracted to positively charged matter?

a)

alpha particle

b)

beta particle

c)

gamma ray

22.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
23.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
24.
What is an isotope? 
a)
A charged atom
b)
An atom with different amounts of neutrons
c)
An atom with different amounts of protons
d)
A neutral atom
25.

When two nuclei are combined into one nucleus, there is a slight change in mass and the release of a large amount of energy. What is this process called?

a)

Fission

b)

Fusion

c)

Conversion

d)

Hydration

26.

How do the nuclear reactions that power the Sun compare to the nuclear reactions that occur in a reactor at a nuclear power facility?

a)

Power plants release radiation and the sun does not

b)

Nuclear reactions on the sun are less powerful than nuclear reactions in power plants

c)

The Sun is powered via nuclear fusion while a nuclear power facility harnesses energy from nuclear fission

d)

Fission occurs on the sun while fusion occurs in a nuclear power facility

27.

External-beam radiation therapy for cancer patients is delivered in the form of a high radiation photon beam directed at cancer cells. What type of radiation provides the high energy photons that can penetrate deep into patients’ tissues?

a)

Alpha

b)

Beta

c)

Acids

d)

Gamma

28.

Finish the following alpha decay reaction:

a)
b)
c)
29.

Complete the following beta decay reaction:

a)
b)
c)
30.

What is the splitting of an atomic nucleus into two smaller parts?

a)

Fusion

b)

Separation

c)

Decay

d)

Fission

31.

What is an isotope?

a)

forms of the same element that contain equal numbers of electrons but different numbers of protons

b)

forms of the same element

c)

forms of the same element that contain equal numbers of protons but different numbers of neutrons

d)

An atom with no nucleus

32.
Which particles make up the nucleus of an atom?
a)
protons and neutrons
b)
electrons and protons
c)
electrons, protons, and neutrons
d)
electrons and neutrons
33.

An isotope of an element has the same number of _________, but a different number of _________.

a)

Protons, electrons

b)

Protons, neutrons

c)

Electrons, neutrons

d)

Neutrons, protons

34.
In order of most to least penetrating radiation we have
a)
Alpha , Beta,  Gamma
b)
Beta , Gamma , Alpha
c)
Gamma, Beta, Alpha
d)
Gamma, Alpha, Beta
35.

Which type of radiation releases an electron?

a)

Alpha radiation

b)

Beta radiation

c)

Gamma radiation

d)

Theta radiation

36.

What particle is released when an unstable isotope undergoes alpha radiation?

a)

a helium nucleus

b)

an electron

c)

a photon of light

d)

a neutron

37.
Which type(s) of radiation would be affected by a magnet?
a)
alpha only
b)
beta only
c)
alpha and beta
d)
gamma only
38.

describes radioactive element decay

a)

quarter life

b)

whole life

c)

wonderful life

d)

half life

39.
The three types of nuclear radiation in increasing order of penetrating power are ____.  
a)
  alpha, beta, gamma 
b)
X ray, beta, gamma
c)
alpha, gamma, beta 
d)
X ray, gamma, beta 
40.
What is the symbol for an alpha particle?
a)
42He
b)
0-1e
c)
0+1 e
d)
10n
41.
The rate at which a radioactive element decays is its ____.
a)
quarter life
b)
whole life
c)
wonderful life 
d)
half life
42.
Name the type of radioactive particle that can be stopped by a sheet of paper.
a)
alpha
b)
beta
c)
gamma
d)
lambda
43.

When nuclei decay, massive amounts of __________ is released.

a)

energy

b)

electrons

c)

protons

d)

neutrons

44.
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
45.
The type of radioactive particle that can be stopped by a sheet of paper is the ____.
a)
alpha particle
b)
beta particle
c)
gamma ray
d)
uranium
46.
The most dangerous type of radiation is the ____. 
a)
alpha particle
b)
gamma ray
c)
beta particle
d)
uranium
47.
Two or more nuclei combine to form one larger nucleus in the process of nuclear _____.
a)
Fusion
b)
Fission
c)
Tracing
d)
Decay
48.
This is an example of...
a)
Fission  reaction
b)
Fusion reaction
c)
Decomposition reaction
d)
Decay
49.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
decay
d)
gamma radiation
50.
This is an example of ---
a)
Radioactive Decay
b)
Nuclear Fission
c)
Nuclear Fusion
d)
Fossil fuel reaction
51.

A radioactive nuclide has a ____ stable nucleus than a non-radioactive nucleus of the same element.

a)

more

b)

less

c)

identical

d)

small

52.
Negatively charged particles emitted from a nucleus at a high speed are ____ .
a)
protons
b)
neutrons
c)
electrons
d)
protons and neutrons
53.
Name the instrument used to detect radioactivity.
a)
voltmeter
b)
ohmeter
c)
seismograph
d)
geiger counter
54.
Both a fusion reaction and a fission reaction produce 
a)
heat (energy)
b)
light
c)
sound
d)
magnetism
55.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
half-life
d)
gamma radiation
56.

The picture shows the process of __________

a)

fission

b)

fusion

c)

alpha decay

d)

beta decay

57.
What is a beneficial aspect of nuclear fission?
a)
The ability to absorb energy
b)
The ability to release tremendous amounts of energy
c)
The ability to produce more energy than nuclear fusion
d)
There are no beneficial aspects of nuclear fission
58.
This is an example of...
a)
Fission  reaction
b)
Fusion reaction
c)
Decomposition reaction
d)
Decay
59.

What is a PRO about nuclear energy?

a)

The amount of energy produced far excess what is produced using fossil fuels.

b)

It is very safe and stable

c)

Both of these are true

60.

What is a CON about nuclear energy?

a)

It causes global warming

b)

It generates hazardous waste that can get people sick

c)

Both of these are true

61.
Nuclear energy creates:
a)
a large amount of energy
b)
a small amount of energy
c)
a medium amount of energy
62.
Two nuclei crash together to form a bigger one, and in the process they kick out a neutron and release lots of energy. This is called...
a)
nuclear fission
b)
nuclear fusion
63.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
64.
Alpha particles.....
a)
a) are positively charged.
b)
b) consist of two protons and four neutrons.
c)
c) can penetrate any thickness of matter
d)
d) All of the above 
65.
The most penetrating type of radiation is the ____.  
a)
alpha particle
b)
gamma ray
c)
beta particle
d)
uranium
66.
A helium nucleus with two protons and two neutrons is called a(n) ____.  
a)
alpha particle
b)
electroscope
c)
beta particle
d)
gamma ray
67.
Negatively charged particles emitted from a nucleus at a high speed are ____.  
a)
alpha particle
b)
gamma rays
c)
beta particles
d)
X rays
68.
This radioactive particle is also known as an electron and has a charge of -1
a)
alpha
b)
beta
c)
gamma
d)
kryptonite
69.

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

a)

1/2

b)

1/3

c)

1/16

d)

1/4

70.
Two nuclei with low masses are combined to form one nucleus of larger mass is called what?
a)
Nuclear fission
b)
Nuclear fussion
c)
Nuclear half-life
d)
Half-life
71.
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
72.
What is the half-life of iodine-131?
a)
32 days
b)
8 days
c)
16 days
d)
24 days
73.

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

a)

50%

b)

25%

c)

12.5%

d)

6.25%

74.

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

a)

50%

b)

25%

c)

12.5%

d)

6.25%

75.

What is the Half life of this isotope?

a)

5 seconds

b)

10 seconds

c)

15 seconds

d)

20 seconds

76.

What is the Half Life of this isotope?

a)

3 days

b)

5 days

c)

8 days

d)

10 days

77.
A helium nucleus with two protons and two neutrons is called a(n) ____.  
a)
alpha particle
b)
electroscope
c)
beta particle
d)
gamma ray
78.
Which type of nuclear radiation is being emitted here?
a)
Alpha
b)
beta
c)
gamma 
d)
none
79.
What particle completes this reaction?
a)
alpha particle
b)
beta particle
c)
gamma particle
d)
neutron
80.
Which type of nuclear radiation is being emitted here?
a)
alpha
b)
beta
c)
gamma
d)
none
81.

Nuclear power plants have many disadvantages. One of those disadvantages is...

a)

reduced CO2 emissions

b)

stable power

c)

nuclear waste

d)

reduced pollution to our atmosphere

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