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

Correct Answer:

Option D – lt is a halogen