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Question

Which of the following represents the electronic configuration of a transition element

A
1s2,2s2p6......ns2p3
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B
1s2,2s2p6......ns2p3,(n+1)s2
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C
1s2,2s2p6......ns2p6d10,(n+1)s2p1
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D
1s2,2s2p6......ns2p6
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Solution

The correct option is B 1s2,2s2p6......ns2p3,(n+1)s2
1s2,2s2p6......ns2p6d3,(n+1)s2 as last electron enters d-subshell.

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