Question

Q.14
Four elements A (with one valence electron), B (with
three valence electrons), C (with five valence
electrons) and D (with seven valence electrons) are
lying in the second period in periodic table which of
the following is/are diatomic at room temperature :
(1) Only C2
(2) Only A2
(3) C, and D
(4) Only B.​

Answer 1

Answer:

4) only B is correct answer