Biology, 25.04.2021 04:50 devinluck100
Atom X has 17 protons. How many electrons are in its valence shell (outermost energy level)?
A. 7
B.3
C.5
D.10
Answers: 1
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Atom X has 17 protons. How many electrons are in its valence shell (outermost energy level)?
A. 7<...
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