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Ivahew [28]
3 years ago
12

Fluorine has an atomic number of 9, how many electron shells does it have?

Chemistry
1 answer:
aleksandr82 [10.1K]3 years ago
4 0
2 shells because if you do the electronic configuration: 
 2,7 which adds up to 9
7 stands for the group it in and it also stands for how many electrons are in the outer shell.
the amount of spaces stands for which period its in therefore it in period 2
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