The atom of an element has electronic con-figuration 2, 8, 7. To which of the following elements would it be chemically similar?

Q. The atom of an element has electronic con-figuration 2, 8, 7. To which of the following elements would it be chemically similar?

A.            N(7)

B.            P(15)

C.            Na(11)

D.            F (9)

Answer: F (9)