Key points: Electronegativity is the ability of an atom to attract the shared electron pair towards itself in a covalent bond . The electronegativity increases from left to the right in a period . The electronegativity decreases down the group . Factors affecting Electronegativity: The key factors that influence electronegativity are as follow: 1.Atomic sizeElectronegativity – Which Factors Influence Electronegativity – Digital Kemistry