Which of these pairs of elements is most likely to be part of a polyatomic ion? li and ik and fmg and brs and o

S and O

Explanation:

what's the

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.