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If an atom has 7 valence electrons, how many electrons does it need to gain to achieve a stable electron configuration? electrons
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If an atom has 7 valence electrons, how many electrons does it need to gain to achieve a stable electron configuration? electrons

User Thirdender
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an atom with 7 valence electrons would need only one more electron to fill that outer shell and make it stable (whereit doesn't want to react with anything anymore)
User Marin
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it takes one more electron because it needs 8 to make it complete

User Satinder
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