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sodium must lose 1 electron, helium is a noble gas it is in group 8 check your Periodic Table, sufide ion must gain 2 electrons

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12y ago
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15y ago

Li- lose 1 e- Br- gain 1 e- Ba- lose 2 e- He- lose/gain 0 e-

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Q: How many electrons must be gained or lost for each of the following to achieve a noble gas electron configuration Lithium atom Bromine atom Barium ion Helium atom?
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