An element in group 1 of the periodic table

An element in group 2 on the periodic table

A chemical reaction that releases thermal energy

A chemical reaction that absorbs thermal energy

States that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after them chemical reaction

An element in group 18 of the periodic table

A substance produced during a chemical reaction

A starting substance in a chemical reaction

An element in groups 3-12 of the periodic table

The outermost electron of an atom that participates in chemical bonding

An element in group 17 on the periodic table

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