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no atoms are gained or lost during a chemical reactions.
if one reactant is available in excess, the other reactant will be the limiting reagent, because...
the distance between the centres (nuclei) of atoms joined in a bond.
a reaction in which heat is absorbed from the surroundings and the temperature of the reaction...
usually metal atoms that lose electrons and become positive ions.
those properties that can change without changing the chemical nature of a substance.