Answer:
The correct answer is electronegativity
Explanation:
The tendency of an atom to attract the bonding electron pair towards itself is termed as electronegativity of that atom.
When two atoms forming a covalent bond differs in their electronegativities at time the bonding electrons are not shared equally by both the atoms.This ultimately result in the generation of bond polarity.
For example HCl is a polar bond as H and Cl has huge difference in their electronegativity.
