Atomic numbers of four elements are as follows: F (9), P (15), Cl (17), Ar (18).Which of the following two elements would be chemically similar?

Atomic numbers of four elements are as follows: F (9), P (15), Cl (17)

1.	Atomic numbers of four elements are as follows: F (9), P (15), Cl (17), Ar (18).Which of the following two elements would be chemically similar?
A.	F and CI
B.	F and P
C.	Cl and P
D.	F and Ar
Answer» B. F and P