First slide

Periodicity in atomic properties

Question

Which of the following is second most electronegative element

Moderate

A

Chlorine
B

Oxygen
C

Sulphur
D

Fluorine

Solution

After fluorine, the most electronegative element is 0xygen as per Pauling's scale of electronegativity.
$χ_{F} = 4 .0 . χ_{Cl} = 3 .0 . χ_{0} = 3 .5, χ_{s} = 2 .5$

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