MCQ
The elements having the electronic configuration, [$Kr$] $4{d^{10}}{f^{14}},\,5{s^2}{p^6}{d^2},\,6{s^2}$ belongs to
- A$s$-block
- B$p$-block
- ✓$d$-block
- D$f$-block
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Given : Molar Mass of $Na$, $O$ and $H$ is $23,16$ and $1\,g\,mol ^{-1}$ respectively