PPT Slide

In a formula, remember that the

subscript identifies the number

of atoms or ions in that compound

or molecule.

Mg+2(C2H3O2-1)2

The 2 indicates the

number of acetate ions

in 1 formula unit of

magnesium acetate.

Al+3 (NO3-1)3

The 3 indicates the

number of nitrate ions

in 1 formula unit of

aluminum nitrate.