Mick8100
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A fluorine ion has nine protons and a charge of -1. how many electrons are in an ion the fluorine. A. 1 B. 9 C. 10 D. 8

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popcornrox37
10, it has gained and electron which increases the charge, as the -1 indicates 
The neutral Fluorine atom has 9 electrons AND 9 protons. So if the F has a -1 charge, then another electron is added so F will now have 10 electrons. so answer C

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