Elements bond in fixed ratios and so can be represented by a chemical formula. For example, sodium chloride has the same number of sodium ions and chloride ions, so its formula is NaCl ...

A little water helps expose the sodium so it can react with the chlorine gas. The reaction releases a lot of heat as the ionic compound sodium chloride is formed. A sodium and chlorine atom are near ...

The potassium and chloride ions are spectator ions. (see your textbook for a discussion of Lewis Acids and Bases.) From a series of qualitative tests and a microanalysis of this complex formed, you ...