MCQ
Variable valency is characteristic of:
- AHalogen.
- ✓Transition elements.
- CAlkali metals.
- DNoble gas.
✓
Answer
Correct option: B.
Transition elements.
In transition metals$, (n−1) d$ and $ns$ electrons have nearly same energy level. Hence, most of these electrons take part in chemical bonding. Hence, transition metals show variable valency.
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