AP Bio Ch2 Atoms & Subatomic Particles

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5 Terms

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Atom

The smallest unit of matter that retains the properties of an element.

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Neutrons

Neutral subatomic particles found in the nucleus of an atom.

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Protons

Positively charged subatomic particles in an atom's nucleus.

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Electrons

Negatively charged subatomic particles that orbit the nucleus.

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Atomic nucleus

The dense center of an atom containing protons and neutrons.