No. of electron in penultimate shell of d- block elements - Vidyadip

MCQ

No. of electron in penultimate shell of $d-$ block elements

✓
$9-18$
B
$19-32$
C
$1-10$
D
$9-32$

✓

Answer

Correct option: A.

$9-18$

a
$(\mathrm{n}-1) \mathrm{s}^{2} \mathrm{p}^{6} \mathrm{d}^{1-10} \mathrm{ns}^{0-2}$

(Penultimate) $=n-1$ shell

$\Rightarrow \quad 9 \quad-\quad 19$

Lower $\quad$ Higher

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