Subatomic Particles and Atomic Structure

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Subatomic particles

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The three kinds of particles that make up atoms: protons, neutrons, and electrons

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Proton

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The positively charged subatomic particle contained in the nucleus of an atom.

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Neutron

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A neutral particle located in the nucleus with a charge of zero.

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Electron

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The negatively charged subatomic particle of an atom.

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Nucleus

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The very small dense region in the center of an atom that contains all the positive charge.

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Isotope

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Atoms of the same element with identical atomic numbers but different atomic masses due to different numbers of neutrons in the nucleus.

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Ion

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An atom that has either gained or lost electrons, and is no longer neutral.

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Electron cloud

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The general area surrounding a nucleus where electrons may be found.

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Energy level

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The possible locations around an atom where electrons having specific energy values may be found.