Which of the following electronic configurations is not possible?
A. 1s²2s²2p²
B. 1s²2s²2p³
C. 1s²2s³2p²
D. 1s²2s²
A. 1s²2s²2p²
B. 1s²2s²2p³
C. 1s²2s³2p²
D. 1s²2s²
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Which of the following electronic configurations is not possible?
A. 1s²2s²2p²
B. 1s²2s²2p³
C. 1s²2s³2p²
D. 1s²2s²
C. 1s²2s³2p²
An s-orbital can hold a maximum of 2 electrons. In choice C, the 2s orbital contains three electrons. Therefore, it is not possible.