The process by which a nucleus of an atom breaks up and emits subatomic particles and/or energy is known as ____.

A) radioactive decay
B) radioactive isotoping
C) electronegativity
D) neutron release
E) free radical release

Radioactive Decay

Process in which an atom emits energy and/or subatomic particles when its nucleus spontaneously breaks up.

Subatomic Particles

Components smaller than atoms, such as electrons, protons, and neutrons, which make up the atom's structure and properties.

Free Radical

Atom with an unpaired electron. Most are highly reactive.