Basic Chemistry Concepts

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Atom

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The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.

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Atomic mass

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The weighted average of an elements stable isotopes

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Atomic number

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The number of protons in the nucleus of an atom, determining the element's identity.

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Atomic radius

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The distance from the nucleus of an atom to the outermost electron shell.

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Neutral Atom

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An atom with an equal number of protons and electrons, resulting in no net charge.

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Chemical symbol

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A one or two-letter abbreviation for a chemical element.

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Element

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A pure substance consisting of only one type of atom.

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Proton

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A positively charged subatomic particle found in the nucleus of an atom.

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Neutron

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A subatomic particle found in the nucleus of an atom, with no electric charge.

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Electron

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A negatively charged subatomic particle orbiting the nucleus of an atom.