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Nuclear Chemistry

Total questions: 22

Worksheet time: 51mins

Name
Class
Date
1.

Which type of radiation has the greatest penetrating power?

a)

Alpha particle

b)

Beta particle

c)

Gamma ray

d)

Neutron emission

2.
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
3.
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
4.

What does it mean when an element is radioactive?

a)

Atom emits radiation

b)

Nucleus is unstable due to uneven proton to neutron ratio

c)

Nucleus changes to become stable

d)

All options listed.

5.
The time taken for half of an amount of radioactive atoms to decay.
a)
Nuclear fusion
b)
Full-life
c)
Dead time
d)
Half-life
6.

After the nucleus of a radioactive element undergoes changes, the element can transform into ...

a)

A different isotope of the same element.

b)

An entirely different element.

c)

Both options listed.

d)

Neither option listed.

7.
The process of nuclear change in an atom of radioactive material is called... 
a)
nuclear decay
b)
nuclear mass
c)
isotopes
d)
radon
8.
Which of the following is an example of nuclear fusion? 
a)
A plutonium atom is used to start a chain reaction that detonates a nuclear weapon 
b)
A uranium atom is split apart into lighter elements
c)
 Two hydrogen atoms are combined to form a helium atom
d)
Two hydrogen atoms bond with an oxygen atom to form a water molecule 
9.
In what part of an atom can protons be found? 
a)
Inside the electrons
b)
Inside the neutrons 
c)
Inside the atomic nucleus 
d)
 Inside the electron shells
10.

Which type of nuclear radiation is being emitted here?

a)

Alpha

b)

Beta

c)

Gamma

d)

Neutron emission

11.
This is an example of...
a)
Fission  reaction
b)
Fusion reaction
c)
Decomposition reaction
d)
Combustion
12.

How does nuclear fusion compare to nuclear fission?

a)

Nuclear fusion produces no radioactive waste

b)

Nuclear fusion produces more radioactive waste

c)

Nuclear fusion is cheaper and easier to produce

d)

Nuclear fusion requires rare, expensive elements to work

13.
Which of the following best describes the process of nuclear fission? 
a)
Splitting an atom's nucleus apart 
b)
Separating an atom's electrons from its nucleus 
c)
Fusing two atomic nuclei together 
d)
Splitting an atom's electrons in half 
14.
What do carbon-12 and carbon-14 have in common? 
a)
They have the same number of protons
b)
They have the same number of neutrons
c)
 They have the same atomic mass
d)
They have the same atomic weight
15.
How is carbon-12 different from carbon-14?
a)
They have a different number of protons 
b)
They have a different number of electrons
c)
They have a different number of neutrons
d)
They are different elements 
16.
The four fundamental forces of nature are: 
a)
Electromagnetism, Gravity, Strong Nuclear, Weak Nuclear
b)
Gravity, Strong Nuclear, Weak Nuclear, Medium Nuclear
c)
Normal Force, Force due to gravity, Magnetism, Nuclear 
d)
Nuclear, Electricity, Gravity, Atomic 
17.
Rank the four fundamental forces of nature in order from weakest to strongest:  
a)
Electromagnetism, Gravity, Strong Nuclear, Weak Nuclear
b)
Weak Nuclear, Gravity, Electromagnetism, Strong Nuclear
c)
Gravity, Weak Nuclear,  Electromagnetism, Strong Nuclear
d)
Weak Nuclear, Electromagnetism, Gravity, Strong Nuclear
18.

When an atom undergoes radioactive decay, the energy that is released is due to:

a)

Gravity

b)

Electromagnetism

c)

Strong Nuclear force

d)

Weak Nuclear force

19.

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%

20.

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

21.

Why do some elements have half-lives?

a)

their nucleus is unstable

b)

gravity can no longer hold the nucleus together

c)

each atom is radioactive and has a half-life

22.
What is the half-life of an isotope if after 20.0 days you have 4.0 grams remaining of a 64.0 grams sample?
a)
1.25 days
b)
5.0 days
c)
0.000305 days
d)
4.25 days

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