MCQ
Elements with valency $1$ are:
- AAlways metals.
- BAlways metalloids.
- ✓Either metals or non-metals.
- DAlways non-metals.
✓
Answer
Correct option: C.
Either metals or non-metals.
Metals and non-metals both can have valency $1.$
Metals which have $1$ valence electron and non-metals which have $7$ valence electrons, have valency $1$. It is because, metals loose their 1e“ and non-metals gain $1e“$ to complete their octet.
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