The "spin-only" magnetic moment [ in units of Bohrmagneton, $(\mu _B )$ ] of $Ni^{2+}$ in aqueous solution would be (At. No. $Ni= 28)$
$6$
$1.73$
$2.84$
$4.90$
$Zn$ and $Cd$ metals do not show variable valency because
Addition of non-metals like $B$ and $C$ to the interstitial sites of a transition metal results the metal
The number of unpaired electrons in ferrous ion is
Nickel steel contain $\%$ of $ Ni$
Select the diamagnetic coloured compound:-