Question

HELP ME PLEASE!! ASAP!!

Which of these pairs of elements is most likely to be part of a polyatomic ion?
Ba and O (Barium and Oxygen)
C and N (Carbon and Nitrogen)
K and Br (Potassium and Bromine)
Rb and Cl (Rubidium and Chlorine)

Answer 1

Option B) Ba and O (Barium and Oxygen)

Step-by-step explanation:

Barium and oxygen elements are the pairs which are most likely to be the part of polyatomic ion. As barium has +2 charge and Oxygen has -2 charge which will be settle once they form an polyatomic ion.