alleryStart learning →Which species has the electron configuration 1s2 2s2 2p6 3s2 3p6?
AAl3+
BMg2+
CK+
DNa+
Answer & Solution
Correct answer: C. K+
K+ has 18 electrons, so its configuration is 1s2 2s2 2p6 3s2 3p6, the same as argon.
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