Chemistry Benchmark Vocabulary

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Protons

Back

Positive particles in an atom.

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Electrons

Back

Negative particles in an atom.

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Group (in the periodic table)

Back

A vertical up and down column on the periodic table - elements in a group share many properties.

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Atomic Mass

Back

The total number of protons and neutrons in an atom.

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Reactant

Back

A substance on the left-hand side of an arrow in a chemical equation that undergoes a chemical change.

Front

Neutrons

Back

Neutral particles in an atom.

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Chemical Equation

Back

A representation of a chemical reaction using symbols and formulas.

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Product

Back

A substance on the right-hand side of an arrow in a chemical equation that is produced.

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Valence Electrons

Back

Electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

Ionic Bond

Back

A type of chemical bond formed through the transfer of electrons from one atom to another.