MCQ
Select the correct option
- A$[Ar]\,\,4s^2\,\,3d^5$ this configuration belongs to $d-$ block
- BMagic No. of $III$ $B$ group is $= 18,\,\,18,\,\,32$
- CIn first transition series total $10$ elements
- ✓All are correct
✓
Answer
Correct option: D.
All are correct
d
$[Ar]\,\,4s^2\,\,3d^5\Rightarrow $ At No. $= 25 (Fe)$ $d-$ Block
$[Ar]\,\,4s^2\,\,3d^5\Rightarrow $ At No. $= 25 (Fe)$ $d-$ Block
$III\,\,B$ magic no. $\Rightarrow \,\,18,\,\,18,\,\,32$
First transition $(3d)\Rightarrow $ At. No. $\Rightarrow $ $21 -30$
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