MCQ
Variable valency of transition elements is on account of:
- AIncomplete $s -$ orbitals.
- ✓Incomplete $d -$ orbitals.
- CCompletely filled $d -$ orbitals.
- DIncomplete $p -$ orbitals.
✓
Answer
Correct option: B.
Incomplete $d -$ orbitals.
$D-$block elements show variable valency due to their incomplete $d-$orbitals.
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