Test 3 #3

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Jessica Wakefield 1H
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Joined: Thu Jul 27, 2017 3:00 am

Test 3 #3

Postby Jessica Wakefield 1H » Fri Nov 10, 2017 1:01 am

Which element in each pair has the lower electron affinity?

P or S

I chose S on the test because it is in the same group as O and so I assumed it behaved the same way? Can someone just clarify why it is that P is the correct answer.

sahiltelang-Discussion 1J
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Re: Test 3 #3

Postby sahiltelang-Discussion 1J » Fri Nov 10, 2017 11:10 am

It is due to the fact that the jump from the nitrogen family to the oxygen family introduces a new electron in the p orbital such that it is the first to be paired. Having a complete half sub shell is much more stable than that addition of the electron pair.

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Re: Test 3 #3

Postby miznaakbar » Fri Nov 10, 2017 11:12 am

Phosphorus, like Nitrogen, has a half filled p-subshell, which is stable so neither of these wants an electron as much as Oxygen or Sulfur. Thus, P will have a lower e affinity than S.

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