WorksheetsNuclear Physics
Total questions: 33
Worksheet time: 17mins
Name
Class
Date
1.
All matter is composed of quarks and leptons.
a)
True
b)
False
2.
Carbon-12 is used to date objects.
a)
True
b)
False
3.
An atom of carbon-14 isotope has more protons than an atom of carbon-12 isotope.
a)
True
b)
False
4.
Nuclear fusion can release large amounts of energy.
a)
True
b)
False
5.
Artificially produced radioactive isotopes are used in medicine and medical research.
a)
True
b)
False
6.
Beta radiation requires _____ to be stopped.
a)
paper
b)
glass
c)
aluminum
d)
lead
7.
Radioactivity is a natural process.
a)
True
b)
False
8.
The neutrons within the nucleus of an atom have what charge?
a)
negative
b)
same as an electron
c)
same as a proton
d)
no charge
9.
The atomic number of an atom is determined by its
a)
number of electrons.
b)
number of protons.
c)
number of neutrons.
d)
sum of protons and neutrons.
10.
Alpha radiation requires _____ to be stopped.
a)
paper
b)
glass
c)
aluminum
d)
lead
11.
What causes the particles within the nucleus of an atom to bond together?
a)
electromagnetism
b)
gravity
c)
weak nuclear force
d)
strong nuclear force
12.
Radioactive nuclei decay to become unstable.
a)
True
b)
False
13.
The electromagnetic force that acts on the protons in the nucleus of an atom is _____ the strong nuclear force that acts on the same nucleus.
a)
stronger than
b)
weaker than
c)
the same as
d)
approximately half
14.
Different nuclides of the same element have
a)
the same number of protons and the same number of neutrons.
b)
the same number of protons but different numbers of neutrons
c)
the same number of neutrons but different numbers of protons
d)
different numbers of protons and different numbers of neutrons.
15.
Gamma rays require _____ to be stopped.
a)
paper
b)
glass
c)
aluminum
d)
lead
16.
Which of the following statements about atomic masses is true?
a)
Atomic masses include masses of neutral atoms.
b)
Atomic masses include masses of bare nuclei.
c)
Atomic masses do not include masses of electrons.
d)
Atomic masses do not include masses of neutrons.
17.
Which process generates energy in the Sun?
a)
nuclear fusion
b)
nuclear fission
c)
chain reaction
d)
transmutation
18.
The nucleus of an atom consists of what particle(s)?
a)
protons only
b)
protons and electrons
c)
protons and neutrons
d)
protons, neutrons, and electrons
19.
An atom emits an electron from the nucleus when
a)
a high-energy photon is emitted.
b)
a proton is formed from a neutron.
c)
there is enough energy to cross the forbidden gap between energy bands.
d)
the frequency of incident radiation exceeds the threshold frequency of the atom.
20.
The strong nuclear force overcomes
a)
the repulsive electromagnetic force between two atomic nuclei.
b)
the repulsive electromagnetic force between protons in a nucleus.
c)
the attractive electromagnetic force between a nucleus and the electrons that surround it.
d)
the attractive electromagnetic force between a nucleus and the electrons surrounding another atom.
21.
In nuclear fission the nucleus is divided into two or more fragments, releasing
a)
protons and energy.
b)
neutrons and energy.
c)
ions and energy.
d)
electrons and energy.
22.
The energy released during nuclear fission is equal to the
a)
strong nuclear force between the two fission products.
b)
repulsive electric force between the splitting protons.
c)
energy equivalent of the mass lost in the reaction.
d)
binding energy in the fission products.
23.
Plutonium-236 (23694Pu) has a half-life of 2.85 years due to alpha decay. This means that, after 8.55 years, 100 g of plutonium-236
a)
will have decayed to 25 g
b)
will have decayed to 12.5 g
c)
will have decayed to 50 g
d)
will still be 100 g of plutonium-236
24.
The mass number of an atom is found by
a)
adding the number of protons and neutrons.
b)
adding the number of protons and electrons.
c)
subtracting the number of protons from the number of neutrons.
d)
subtracting the number of protons from the number of electrons.
25.
The daughter isotope produced by the beta decay of 23490Th
a)
23489Ac
b)
23491Pa
c)
23492U
d)
23088Ra
26.
The loss of an alpha particle by a radioactive nuclide causes
a)
no change in mass number.
b)
the atomic number to decrease by 4.
c)
the mass number to decrease by 2.
d)
the atomic number to decrease by 2.
27.
In the nucleus , 23892U there are
a)
92 protons and 238 neutrons
b)
92 protons and 146 neutrons
c)
146 protons and 92 neutrons
d)
238 protons and 92 neutrons
28.
A nucleus becomes increasingly unstable when
a)
there are more protons than electrons
b)
there are more protons than alpha particles
c)
there are more neutrons than protons
d)
it decays alpha particles from the nucleus
29.
AZX →AZ-1Y+01e
a)
Alpha
b)
Beta
c)
Gamma
d)
Positron
30.
AZX →AZ-1?+00γ
a)
Alpha
b)
Beta
c)
Gamma
d)
Positron
31.
Einstein's famous mass/energy equation is E = mc2. The c represents
a)
the speed of sound
b)
the energy produced
c)
the destroyed mass
d)
the speed of light
32.
Einstein's famous mass/energy equation is E = mc2. The m represents
a)
Mass
b)
Mass defect
c)
Mass effect
d)
Mass destroyed
33.
There are three main naturally occurring decay series. They all end up with a stable isotope of
a)
Lead
b)
Strontium
c)
Plutonium
d)
Actinium
100 %
