<p>If IE and EA of an element are 280 and 90 kcal&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>m</mi><mi>o</mi><msup><mi>l</mi><mrow><mo>-</mo><mn>1</mn></mrow></msup></math>&nbsp;respectively then EN of the element on Pauling scale is:</p>