Write the symbols and valencies of the following radicals:

Carbonate.

Write the symbols and valencies of the following radicals:

Nitrate.

Write the symbols and valencies of the following radicals:

Oxide.

Write the symbols and valencies of the following radicals:

Bisulphate.

Write the symbols and valencies of the following compounds:

Aluminium ion.

Name the following radical:

${{\mathrm{SO}}_4}^{2-}$

Name the following radical:

${{\mathrm{HCO}}_3}^{-}$

Name the following radical:

${\mathrm{OH}}^{-}$

Name the following radical:

${\mathrm{Cr}}_2{{\mathrm{O}}_7}^{2-}$