Atoms gain or lose valence electrons until they have the same number of valence electrons as the closest atmospheric gas

Draw metallic bonding if two copper

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Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons