Electronegativity is the property related to :
Electronegativity is a dimensionless
property because it is only a tendency. It indicates the effective result of
the tendencies of atoms in different elements to attract the bond-forming pairs
of the electron. One can measure electronegativity on many scales. Fluorine is the
most electronegative element in the table with electronegativity as 3.98.
Caesium is the least electronegative element with value 0.79.
The correct option is D.