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An element X has electron configuration 1s2 2s2 2p6 3s2 3p5. Which of the following ...

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An element X has electron configuration 1s2 2s2 2p6 3s2 3p5. Which of the following statements is correct about the element?

A. lt has a completely filled p-orbital
B. lt has 5 electrons in its outermost shell.
C. lt belongs to group ll on the periodic table
D. lt is a halogen




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