Which element has the core electrons 1s22s22p6? Select the correct answer below: He O Be Na

Which element has the core electrons 1s22s22p6? Select the correct answer below: He O Be Na

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Which element has the core electrons 1 s 2 2 s 2 2 p 6 ?
Select the correct answer below:
H e
O
B e
N a

Detailed Answer