Question

what is electro negativity and how is it vary in groups and periods​

Answer 1

Electronegativity is a measure of an atom's ability to attract shared electrons to itself. On the periodic table, electronegativity generally increases as you move from left to right across a period and decreases as you move down a group.

Answer 2

Answer:

The tendency of an atom to attract the shared pair of electrons towards itself is know as electronegativity