Chemistry I: Nuclear Chemistry Unit Test

question

Which is the most susceptible to damage from ionizing radiation?
answer

soft tissue
question

What is the change in the atomic number when an atom emits an alpha particle?
answer

decreased by 2
question

What is the change in atomic number caused by the emission of gamma radiation?
answer

remains the same
question

Which of the following materials is necessary to stop a beta particle?
answer

thin pieces of wood
question

A neutron breaks down to form _________.
answer

a proton and an electron
question

What does the band of stability for atomic nuclei refer to?
answer

the ratio of neutrons to protons
question

What particle is needed to complete this nuclear reaction? 222/86 Rn –> 218/84 Po + ________
answer

4/2 He
question

How does an atom with too many neutrons relative to protons undergo radioactive decay?
answer

by emitting a beta particle
question

What particle is needed to complete the following equation? 14/7 N + ____ –> 14/6 C + 1/1 H
answer

1/0 n
question

What is the approximate half-life of uranium-238?
answer

billions of years
question

A reaction in which small nuclei combine to form a heavier nucleus is called ______.
answer

fusion
question

What substances are used as moderators in a nuclear reactor?
answer

carbon and water
question

What instrument is used routinely to check a person’s exposure to radiation?
answer

film badge
question

Radioisotopes taken internally for medical reasons ______.
answer

should have a short-half life

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