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Nuclear Radiation

Key vocabulary terms for Chapter 16 (sections 1 & 2)

QuestionAnswer
What is radioactivity? (Also known as radioactive decay). The process by which high energy particles and energy are given off by unstable atoms.
What is mass number? The sum of the number of protons and neutrons in the nucleus of an atom.
What is alpha decay? A helium nucleus - two protons and two neutrons. A form of radioactive decay.
What are the three kinds of radioactive decay? Alpha decay, beta decay, and gamma decay.
What is beta decay? The release of a beta particle (either an electron or positron) from an unstable nucleus.
What is gamma decay? The release of gamma rays (most energetic form of light) from an unstable nucleus.
Created by: tmt2018
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