Coordination Compounds

The 'spin only' magnetic moment value of \(\mathrm{MO}_4{ }^{2-}\) is ________ BM. (Where M is a metal having least metallic radii. among \(\mathrm{Sc}, \mathrm{Ti}, \mathrm{V}, \mathrm{Cr}, \mathrm{Mn}\) and \(\mathrm{Zn}\) ).

(Given atomic number: \(\mathrm{Sc}=21, \mathrm{Ti}=22, \mathrm{~V}=23, \mathrm{Cr}=24, \mathrm{Mn}=25\) and \(\mathrm{Zn}=30\))