Basic Chemistry Concepts

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Atom

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

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Electron

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A subatomic particle with a negative charge, found in all atoms and acting as the primary carrier of electricity in solids.

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Proton

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A subatomic particle found in the nucleus of every atom, with a positive electric charge.

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Neutron

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

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Element

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Pure substance made of a single type of atom

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Covalent Bond

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A chemical bond that involves the sharing of electron pairs between atoms.

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Ionic Bond

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A chemical bond is formed when electrons are taken by one of the atoms

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Compound

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A substance formed when two or more chemical elements are chemically bonded together.

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Catalyst

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A substance that increases the rate of a chemical reaction .

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Van der Waal force

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forces of attraction between molecules.