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an atom with more or less electrons than a neutral - negative charge = more electrons- positive charge = less electrons* protons never change- all stable ions have the same electron configuration as noble gasses (isoelectronic)

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1. an atom with more or less electrons than a neutral
- negative charge = more electrons
- positive charge = less electrons
* protons never change
- all stable ions have the same electron configuration as noble gasses (isoelectronic)





 
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