Question

In any period, the valency of an element

• A. Increases one by one from IA to VIIA
• B. Decreases one by one form IA to VIIA
• C. Increases one by one from IA to IVA and then decreases from VA to VIIA one by one
• D. Decreases one by one from IA to IVA and then increases from VA to VIIA one by one

Answer 1

The correct option is C

Increases one by one from IA to IVA and then decreases from VA to VIIA one by one

While moving left to right across a period, the number of valence electrons of elements increases and varies between 1 to 8.

But the valency of elements, when combined with H or O, first increases from 1 to 4 and then it reduces to zero.