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Which of the following is the electron configuration of an excited atom that is likely to emit a quantum of energy?
A. 1s2 2s2 2p6 3s2 3p1
B. 1s2 2s2 2p6 3s2 3p5
C. 1s2 2s2 2p6 3s2
D. 1s2 2s2 2p6 3s1
E. 1s2 2s2 2p6 3s1 3p1
Sagot :
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