Electronegativity, symbol , is a chemical property that describes the tendency of an atom to attract 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 ability of an atom to attract electron towards itself is called? Okie... think carefully first, then make a decision:
To answer this question, we should know that: Electronegativity, symbol , is a chemical property that describes the tendency of an atom to attract electrons (or electron density) towards itself. So, the answer is Electronegativity.