Which element has the greatest electronegativity?

In simple terms, electronegativity is a measure of the ability of an atom to pull or attract electrons toward itself when it is chemically bonded to another element. The higher the electronegativity, the more that atom's nucleus "pulls" the bonding electrons toward itself. read more

Fluorine, with seven electrons in its outermost energy level, has a high affinity for its electrons. It holds onto its existing electrons securely and also wants to collect another electron from other elements. The electronegativity of elements on the periodic table increases from bottom to top and from left to right. read more