Factors influence on electronegativity
Answers
The electronegativity of an element is influenced by following factors.
1. Nuclear charge
The higher the nuclear charge, more will be the electronegativity value of an element, since the nucleus will be able to attract or pull more electrons towards itself.
2. Atomic size
Size of the atom is inversely proportional to electronegativity value. The smaller the element, higher is its nucleus's reach towards the outer shell. Thus, more will be the electronegativity. An example of this is Fluorine, the first member of the halogen series.
Fluorine is the most highest electronegative element available and is the smallest one too.
3. Screening effect or shielding effect
If the outermost electrons shields the nucleus effectively, the electronegativity of the element decreases.