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Periodicity

The one with ...

Question

The one with the lowest electron affinity in group $16$ is:

A

Oxygen

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B

Sulphur

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C

Selenium

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D

Tellurium

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Solution

The correct option is A Oxygen
Electron affinity values for group $16$ elements:
$O = 141 k J / m o l S = 200 k J / m o l S e = 195 k J / m o l T e = 190 k J / m o l P o = 174 k J / m o l$
Hence, oxygen has the lowest electron affinity value in group $16.$

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