Biology, 14.12.2021 01:00 jakeyywashere
Which elements atoms have 2 electrons in the first energy level and 4 electrons in the second energy level?
A. Carbon
B. Nitrogen
C. Helium
D. None of the above
Answers: 3
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Which elements atoms have 2 electrons in the first energy level and 4 electrons in the second energy...
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