Nuclear Chemistry worksheets
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What makes something radioactive?
elements with an atomic number above 80
unstable nuclei
contaminated sewage
stable nuclei
high energy electrons
The splitting of a nucleus into smaller nuclei is
nuclear fusion
nuclear fission
radioactive half-life
gamma radiation
beta radiation
Why does alpha decay occur?
The nucleus is too large to be stable
The proton to neutron ratio is unstable
The nucleus is in an excited state. This usually follows other types of decay.
The isotope has too many high energy electrons
The nucleus is too small to be viable by itself
Why does beta decay occur?
The nucleus is too large to be stable
The proton to neutron ratio is unstable
The nucleus is in an excited state. This usually follows other types of decay.
The nucleus is too small to be viable by itself
The isotope has too many high energy electrons
Why does gamma decay occur?
The nucleus is too large to be stable
The proton to neutron ratio is unstable
The nucleus is in an excited state. This usually follows other types of decay.
The nucleus is too small to be viable by itself
The isotope has too many high energy electrons
Which reaction represents nuclear fission?
F
G
H
J
What is the term for an ongoing series of nuclear reactions?
radiation
chain reaction
fusion
nucleotide
radioactivity
Nuclear fission of uranium-235 can start a chain reaction by
releasing enough thermal energy to start nuclear fission in neighboring atoms
producing two smaller atoms that can then strike and split neighboring atoms
producing neutrons that can then strike and split neighboring atoms
combining two atoms with low mass to form one large atom
after releasing high energy gamma photons it continues the process
Nuclear fission rarely occurs spontaneously. Instead we can induce nuclear fission or this release of energy when the nucleus splits. How do we start the chain reaction of nuclear fission?
Shooting a high energy Proton at the sample
Shooting a high energy Neutron at the sample
Shooting a high energy Electron at the sample
Shooting a high energy Positron at the sample
Shooting a high energy Photon at the sample
Which of the following best describes how nuclear reactions are used to generate electricity?
Nuclei produced in reactions generate electromagnetic waves.
Heat from fission is used to produce steam, which drives a turbine.
Splitting nuclei give up their electrons, when they flow through wires.
Light from fission is captured by photocells, which produce electricity.
Which nuclear process is shown in the picture?
nuclear fission
nuclear fusion
alpha decay
beta decay
gamma decay
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?
33.0 mg
12.5 mg
.33 mg
15.8 mg
50.0 mg
Fission is the nuclear process of splitting an atom's nucleus into two smaller elements, which of the following types of radiation is most similar to the fission reaction?
Alpha radiation
Beta radiation
Gamma radiation
Fusion radiation
Electron capture
If you start with a complete sample, how much of the sample is left after the third half-life?
1/2
1/3
1/16
1/8
1/5
If 1,000 g of iodine-131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.
125g
1,500g
1.25g
25g
50g
The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0g?
3.0g
1.25g
0.3g
0.25g
0.0125g
If the half-life of uranium-232 is 70 years, how many years will it take for 10 g of it to be reduced to 1.25 g?
350 years
232 years
210 years
140 years
17 years
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?
0
1
2
3
4
What is Half-life?
The amount of time it takes for some of the nuclei in a sample of the isotope to decay
The amount of time it takes for half the electrons in a sample of the isotope to decay
The amount of time it takes for half the nuclei in a sample of the isotope to decay
the amount of time it takes to double the nuclei in a sample of the isotope to decay
What is the Half Life of this isotope?
3 days
5 days
8 days
10 days
1 day
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