Question

How the greater electronic charge density affects the more attractions of electrons in the electronegative atoms??🤔🤔🤔
​​​​​If there is a greater electronic charge density, then , it must be satisfied with the electrons, and thus the attractions will decrease. But Sir said, greater electronic charge density leads to have a tendency to attract more electrons in the electronegative atoms.

Why does this happen???🤔🤔🤔
And what is the actual explanation??

Answer 1

Electonegative and electropositive atoms in the same periodic table row has electons in the same shell.
But electonegative atoms have higher number of protons than electropositive atoms.
Thus they can attract electrons in outer shell with much more force than Epositive atom.
Thus the atomic radius is much lower for Enegative atoms.
This gives them a higher force to capture more electrons.
Thus even with higher electronic charge density they are more electronegative.

But as we go along a column things change.
Increase in atomic radius is much lower compared to increase in atomic number.
Here electronic density increase drastically but due to the shielding by large number of electrons electronegativity reduces.