Question

Hey guys.....

Why the electron affinity of sulphur more then oxygen?

A nice explanation please....

##Class 11 Chemistry

¶¶Answer only if you know¶¶

Answer 1

Heya.......!!!!

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First of all let us know about Electron Affinity :-

=> Energy released when an electron is added to the valence shell of an isolated gaseous atom .

=> As we move down a group from top to bottom electron Affinity becomes less negative because size of atom increases .

=> → Electron Affinity for third period elements i.e ( P , S , Cl ) their Electron Affinity is more negative than the second period elements i.e ( N , O F ) , This due to smaller size of the atoms of second period elements which produce larger electron repulsion for addition of electron .



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Answer 2

because oxygen being smaller in size than sulphur ,has its Valence shell electron placed more closely than sulphur as electron gain by oxygen reduce energy and have less affinity..whereas sulphur loses electrons and gain energy and has more affinity...

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