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Physical Chemistry

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Joined:	15 Jan 2007
Post:	19

9 Feb 2007 12:28:36 IST

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528

tough question

None

each of the following sets of quantum numbers represent an electron that has been the last electron added to complete the elctronic configuration of an element according to aufbau principle.what element dose each set indicate?

ELEMENT n m s

A 2 0 +1/2

B 2 +1 -1/2

C 3 0 -1/2

even though the solution is given iam unable to understand the steps.please explain me in detail

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swaroop kuse

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Joined: 7 Feb 2007

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9 Feb 2007 13:28:42 IST

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see yashwant ur question is not clear as u have said that the electrons are added to last shell
but in the table below u have written element A, B...

plz do explain ur question

Bipin Dubey

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Joined: 23 Jan 2007

Posts: 7942

21 Feb 2007 06:01:35 IST

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For A : n=2 m=0(2nd p orbital or s orbital) s=1/2(1st electron in orbital)
Hence A's atomic no. can be 3 or 7.
Hence A can be lithium or nitrogen.

U must specify l values to know rhe exact element.

Best Wishes

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