There are Various Scales to calculate the Electronegativity of the elements such as Pauling scale, Mulliken scale, Allred Rochow scale, Different scale assumes different values of Electronegativity.

The tendency of an atom to attract electrons is called Electronegativity, Fluorine is said to be having the highest value of electronegativity.

Different scales have different formulae to calculate the value of Electronegativity. We are given with radius and atomic number so u can use Allred Rochow scale to calculate Electronegativity.

Electronegativityty=(0.359Z/r^2) +0.744

Where Z is effective nuclear charge and r is the atomic radius in Angstrom.