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WorksheetsNuclear chemistry
Total questions: 10
Worksheet time: 6mins
What does the 4 in He-4 represent?
the mass number
the atomic number
>
the number of protons
the number of neutrons
Balance the following equation: Ra-228 --> Rn-224 + _____
gamma ray
alpha particle
neutron
beta particle
Balance the following equations: U-228 --> U-239 + _____
neutron
proton
alpha particle
beta particle
Np-239 emits a beta particle. What element is the other product?
Th-239
U-239
Pu-239
Pu-238
The spontaneous disintegration of a nucleus into a slightly lighter and more stable nucleus, accompanied by emission of particles, electromagnetic radiation, or both, is
nuclear fusion
nuclear fission
radioactive decay
nuclear decay
Which of the following processes always decreases the number of protons by an even number?
beta decay
positron decay
alpha decay
fission
Which statement is true about half-lives?
Different atoms of the same nuclide have different half-lives.
Each radioactive isotope has its own half-life.
All radioactive nuclides of an element have the same half-life.
All radioactive nuclides have the same half-life.
What is the half-life of an isotope if 125 g of a 500 g sample of the isotope remain after 3.0 years?
1.5 yrs
2.5 yrs
3.5 yrs
4.5 yrs
Which of the following generally have the lowest penetrating ability?
alpha particles
beta particles
gamma rays
they all have the same penetrating power
Which of the following does not detect radiation?
Geiger counter
scintillation counter
film badge
radioactive tracers
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