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Question

Which element has the electron configuration of 1s22s22p63s23p4?

A
Ar
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B
O
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C
S
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D
Ti
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E
U
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Solution

The correct option is C S
S (Z=16) has the electron configuration 1s2s22p63s23p4
The electronic configuration of Ar (Z=18) is 1s2s22p63s23p6
The electronic configuration of O (Z=8) is 1s2s22p4
The electronic configuration of Ti (Z=22) is 1s2s22p63s23p64s23d2
The electronic configuration of U (Z=92) is [Rn]5f36d17s2

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