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Chapter 16 Atomic
Atomic Energy
Question | Answer |
---|---|
The process by which an unstable nucleus gives off nuclear radiation | radioactivity |
The sum of the numbers of protons and neutrons in the nucleus of an atom | mass number |
Atoms that have the same number of protons as other atoms of the same element do but have different numbers of neutrons | isotopes |
The time needed for half of a sample of a radioactive substance to undergo radioactive decay | half-life |
The splitting of the nucleus of a large atom into two or more fragments; releases additional neutrons and energy | nuclear fission |
A continuous series of nuclear fission reactions | nuclear chain reaction |
The combination of the nuclei of small atoms to form a larger nucleus; releases energy | nuclear fusion |