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Its outer shell needs 3 more electrons (because 2+3=5) you need 8 in order for the outer shell to become stable being that there is 5 on the outer shell already what plus 5 gives you 8 3 of course so that why you add 3.

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11y ago
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13y ago

Phosphorus must gain 3 electrons to achieve a stable electron configuration.

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12y ago

In ionic bonding, phosphorus atoms need to gain 3 electrons to become stable, forming phosphide ions (P3-).

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10y ago

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Q: How many electrons must be gained for phosphorus to have a stable electron configuration?
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