Question

Why does electronegativity decrease from right to left within a period?

Answer 1

Explanation:

Electronegativity is the ability of an atom to attract electron.

Greater the nuclear force on the outermost electron,greater will the be the chances of attracting electron.

Across a period. The shell number is constant. but atomic number increases . when atomic no. increases.number of proton increases, proton is a nuclear charged partice which increases nuclear charge. so size decreases. so attractive force of electron on outermost shell increases. so electronegativity increases.