Question

How does valency of an element vary across a period​

Answer 1

the number of electrons that must be lost or gained by an atom to obtain a stable electron configuration. In the periodic table period, the valency of an element first increases and then decreases. ... The valency varies from +1 to +4 or -4 through these 8 elements, in the first 4 elements of these 8 elements.

Answer 2

the number of electrons that must be lost or gained by an atom to obtain a stable electron configuration. In the periodic table period, the valency of an element first increases and then decreases. ... The valency varies from +1 to +4 or -4 through these 8 elements, in the first 4 elements of these