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Q.

Which is the least electronegative element?

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a

Nitrogen

b

Cesium

c

Fluorine

d

Oxygen

answer is B.

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Detailed Solution

According to Pauling’s scale fluorine is the most electronegative of all elements and has an electronegativity value of  4.0.

Caesium on the other hand is the least electronegative with a value of 0.7.

Hence Cesium is the least electronegative element.

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