They represent the number of atoms of each element in the formula ... produce a sodium hydroxide solution. The pH of this solution would be 14, which shows it is an alkali. A non-metal.

Researchers have highlighted that the new material, sodium vanadium phosphate with the chemical formula NaxV2(PO4)3 ... voltage of 3.7 volts versus sodium metal, higher than the 3.37 volts ...