Question

How does electrico positively of elements get affected as we move down a group and Cross the period​

Answer 1

Answer:

Electropositivity - Tendency to "lose" electrons.

As we go down the group, we find metallic nature of elements increasing.

Also, metals are known to be electropositive ( as they tend to lose electrons all the time).

Also the atomic radius of elements goes on increasing down the group.

Due to this , electrons can be easily lost from the outermost shell , as nucleus is way too far from the outermost shell .

But , on the other hand, electropositivity decreases across the period , as the atomic size goes on decreasing and, the nuclear charge is more , on the electrons. Hence, the as we go across the period , the elements tend to be electronegative in nature( tendency to gain electrons)