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A subscript or superscript is a number, figure, symbol, or indicator that is smaller than the normal line of type and is set slightly below or above it.
Best Answer: Coefficients - number of separate bits. Subscripts - number of atoms of an element in each bit. Example; 3 H(subscript2)O means three molecules, each of them containing two H and one O O2 is one oxygen molecule containing two atoms. 2O is two separate oxygen atoms.