MCQ
An element having the electronic configuration $\left[ {Ar} \right]3{d^2}4{s^2}$ belongs to
- A$s - $ block elements
- B$p -$ block elements
- ✓$d -$ block elements
- D$f - $ block elements
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Given : $K_b(H_2O) = 0.51\, Kkg \,mol^{-1}$
$N_A = 6 × 10^{23}$
$[Li = 7, \,\,Na = 23$, $K = 39,\,\, Rb = 85.5$ , $Cs = 133, \,\,Cl = 35.5]$