Its D because
Li = 6
Be =9
C= 12
O=15
It would be carbon dioxide because carbon dioxide makes up the vast majority of greenhouse gas .
Answer:
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1s2 2s2 2p1
fifth electron is in 2p orbital
so answer is 2 2 -1 -1/2 , or 2 2 -1 1/2
*1/2 and -1/2 are spins, so they are interchangeable when writing the first electron in the ml
