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

Chemistry
JAMB 2014
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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Correct Answer: Option D
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