Question

what is the electronegativity

Answer 1

Electronegativity symbol X, is a chemical properties that describe the tendency of an atom to attract a shared pair of electron toward itself

Answer 2

Electronegativity, symbol χ, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons(or electron density) towards itself An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The higher the associated electronegativity number, the more an element or compound attracts electrons towards it.

The term "electronegativity" was introduced by Jöns Jacob Berzelius in 1811, though the concept was known even before that and was studied by many chemists including Avogadro.