What is electronegativity? How is this useful in understanding the nature of elements?

Explanation

Electrongativity: The tendency of an element (or) atom to attract the shared pair of electrons towards it self in a molecule is called electronegativity.
`rarr` On the basis of electronegativity values nature of elements can be predicted. Higher electronegativity values indicates that element is non metal and lower values indicates that the element is a metal.
`rarr` On the basis of electronegativity values bond nature also predicted (lonic/covalent).