whether or not a person develops radiation sickness depends on the ___ of the exposure to radiation

radioactive materials have unstable

the process of nuclear change in an atom of radioactive material is called

in alpha decay, the mass of the atom before the decay

when a nucleus undergoes nuclear decay by gamma rays, the atomic number of the element

the attractive force between protons and neutrons in a nucleus caused by the strong nuclear force acts only

nuclei with too many or two few neutrons are

fusion occurs when nuclei

a fission chain reaction can be slowed by using material that will

background radiation can come from

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