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PLEASE ANSWER FAST !!
The partial electron configuration of an atom with 12 electrons is shown.
1s²2s²2p^6 xx

Which of the following does X represent?
2d²
35²
3p²
4s²

PLEASE ANSWER FAST The partial electron configuration of an atom with 12 electrons is shown 1s2s2p6 xx Which of the following does X represent 2d 35 3p 4s class=

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