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PS-Ch16

Physical Science Chapter 16 - Atomic Energy (Vocab)

QuestionAnswer
the process by which an unstable nucleus gives off nuclear radiation radioactivity
Who discovered radioactivity? Henri Becquerel
another name for radioactivity radioactive decay
the three types of radioactive decay alpha decay, beta decay, gamma decay
the release of alpha particle from a nucleus alpha decay
a particle made up of two protons and two neutrons, the nucleus of a helium atom alpha particle
the release of beta particle from a nucleus beta decay
a particle made up of an electron or positron beta particle
an atom that has the same number of protons as other atoms of the same element do but that has a different number of neutrons isotope
the release of gamma rays from a nucleus: ray is pure energy (light) gamma decay
the form of light that has very high energy gamma rays
the time needed for half of a radioactive substance to decay half-life
radioactive elements whose paths can be followed through a process or reaction tracers
Created by: diane3475
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