Write the chemical name of the following compound.

${\mathrm{Na}}_3{\mathrm{PO}}_4$

• The chemical name of positive radical Na⁺ is sodium ion and of negative radical ${\mathrm{PO}}_4^{3-}$ is phosphate.
• The name of the positive radical or metal ion is written first followed by the negative radical while writing the name of the compound.
• The chemical name of ${\mathrm{Na}}_3{\mathrm{PO}}_4$ is trisodium phosphate.