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12 Cards in this Set

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Discrete energy and discrete energy levels

An energy level has to be in a fixed place around The atom. The energy level can't be between one of the fixed places, within the area it stays in.

Transitions between energy levels

When an electron has an abnormal amount of energy, so it moves to a higher or lower energy level, emmiting light.

Radioactive decay

Radioactive decay is the spontaneous breakdown of an atomic nucleus resulting in the release of energy and matter from the nucleus.

Strong force (fundamental force)

Weak force (fundamental force)

Electromagnetic force (fundamental force)

Gravity (fundamental force)

Alpha particles

Negative beta decay

Gamma ray

Half life

the time taken for the radioactivity of a specified isotope to fall to half its original value.

Positive beta decay