Explain why an element with a large atomic radius won't have a high electronegativity

Explanation:

The larger the radius of an atom, the lesser the electronegativity of the atom. This is because of the screening effect.

Electronegativity of an element is a property that combines the ability of its atom to lose or gain electron. It is mostly expressed as the measure of the relative tendency with which the atoms of the element attract valence electrons in a chemical bond. The larger an atom, the lesser the nuclear charge on the outermost electrons. This weak shielding of these outer shell electrons results in them easily being lost.