Question
Explain the trend in following atomic properties of group 16 elements:
Electronegativity
✓
Answer
The electronegativity decreases down the group. Oxygen has the highest electronegativity next to fluorine amongst all the elements.
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→$\begin{aligned}
& \Delta_{ f } H^0_{ NaCl _{( s )}}=-411 kJ mol ^{-1}; \\
& \Delta_{( sub )} H_{ Na _{( s )}}^0=109 kJ mol ^{-1} \text {; } \\
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