Elements with valency 1 are

• GC Atomic Structure

Elements with valency 1 are

1. always metals
2. always metalloids
3. either metals or non-metals
4. always non-metals

Answer

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 its 1 electron and non-metals gain 1 electron to complete their octet.

The correct option is C.