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It would otherwise be an ion, which is just like an atom in all regards except it is missing electrons or has extras. An ion always tries to get rid of extras or gain when it has too few, because that is just how things are: it is positive and attracts negatives when it has too few, or is negative and has less attraction than one that is positive to its own electrons when it has too many.

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12y ago
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14y ago

To be neutral, all compounds need the same number of protons and electrons. The protons and electrons have positive and negative charges that cancel each other out in a 1:1 ratio.

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12y ago

yes, or else the earth would explode :D

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Q: Why does an atom have to be neutral?
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