Solid $CuSO_4·5H_2O$ having covalent, ionic as well as co-ordinate bonds. Copper atom/ion forms ................. co-ordinate bonds with water.
$1$
$2$
$3$
$4$
The transition metal having highest $3^{\text {rd }}$ ionisation enthalpy is :
The decrease in atomic volume from $Cr$ to $Cu$ is very negligible because
The magnetic moment of a transition metal compound has been calculated to be $3.87$ $B.M.$ The metal ion is
The ionisation energies of transition elements are