Multi-Electron Configurations and Orbital Diagrams
What is the e...
Question
What is the electron configuration for the oxide (O2−) ion?
A
1s22s22p6
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B
1s22p63s2
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C
1s22s22p2
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D
1s22s22p4
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Solution
The correct option is A1s22s22p6 O2− has 10 electrons. Thus its configuration is 1s22s22p6 We can observe that this is same as configuration of Ar. Hence answer is option A.