Question

on moving from left to right in a group,the number of valence elctrons____________​

Answer 1

Here your answer

Electron affinity increases from left to right across the periodic table. This is caused by the decrease in atomic radius. As we already explained, moving from left to right across a period, atoms become smaller and smaller as the atomic number increases.

Electron affinity decreases as we proceed down a group.

Answer 2

Hi,

On moving from left to right in the periodic table, the number of valence electrons increases as more electrons are added in the same shell.

Hope it helps!☺