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The most central part of an atom containing the neutrons and the protons
From the Latin “nucleus” meaning “kernel” or “inner part” |
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Stable means “steady” or “secure”
A stable nucleus is one that does not undergo radioactive decay |
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Unstable means “prone to change”
An unstable nucleus is likely to undergo radioactive decay to become a stable nucleus |
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| Holds the protons and neutrons in an atom’s nucleus together |
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| Transferring of electrons and rearranging of atoms to form new compounds |
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| Radioactive decay of a nucleus to form new atoms and radioactive particles |
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Smallest unit of an element
From the Greek “atomos” meaning “indivisible” |
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| 2 or more elements bonded together |
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2 protons + 2 neutrons emitted from an unstable nucleus
Large and slow; not very harmful to humans |
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An electron emitted from an unstable nucleus
Small and fast; moderately harmful to humans |
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Energy emitted by an unstable nucleus
Highest energy and frequency on the electromagnetic spectrum; very harmful to humans |
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Naturally occurring radiation that is always present
Comes from space, the sun, rocks, soil and more
Does NOT come from anything man-made |
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