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RADIOACTIVITY

Chapter 19

QuestionAnswer
radioactive element elements that emit alpha, beta or gamma radiation
alpha particle two protons and two neutrons or a nucleus of a helium atom
beta particle an electron ejected by an atomic nucleus
gamma radiation extremely energetic form of radiation with no charge and no mass
strong nuclear force very strong force that holds the nucleus together
transmutation when one element changes to another by emitting an alpha or beta
half-life time needed for half the radioactive atoms to decay
fission splitting of atomic nucleus into parts; releases energy
chain reaction occurs when the product of the reaction starts another reaction
fusion small nuclei fuse together producing energy
Created by: bhs
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