Chemistry, 30.08.2021 18:30 deadslinger5134
Hydrogen has one electron, which is located in the first energy shell. Helium has two electrons in the first energy shell. Lithium has three electrons—two in the first energy shell and one in the second. How might this pattern be related to the fact that hydrogen and lithium are both reactive, but helium is unreactive?
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Hydrogen has one electron, which is located in the first energy shell. Helium has two electrons in t...
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