Question

What is electronegativity? How does it varies in a periodic table?​

Answer 1

Answer:

hey mate

here's your answer

Electronegativity is the ability of an atom to attract a shared pair of electrons towards itself.

It varies in periodic table in the following way

In a period :

The electronegativity of atoms increases as you move from left to right across a period in the periodic table. This is because as you go from left to right across a period, the nuclear charge is increasing faster than the electron shielding, so the attraction that the atoms have for the valence electrons increases. Thus increasing electonegativity.

In a group :

From top to bottom down a group, electronegativity decreases. This is because atomic number increases down a group, and thus there is an increased distance between the valence electrons and nucleus, or a greater atomic radius.

hope it works