Chemistry

Chemistry, 03.09.2020 19:01, ghostlyfrost67p8u0ey

Which element does not form a stable ion with the same electronic structure as argon? A aluminium
B chlorine
C phosphorus
D potassium

the answer is A, but i chose D. i just need to know why is it wrong. thanks!

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Which element does not form a stable ion with the same electronic structure as argon? A aluminium

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