1. Sodium is an alkaline metal which is very reactive and so is not found free in nature. Sodium forms ionic compounds with the halogen group elements. Calculate the mass percent composition of each element in NaF, NaCl, NaBr, and Nal! (Ar Na = 23, F = 19, Cl = 35.5, Br = 80, I = 127)

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".