Question Detail
Question
Which of the following is an example of a polyatomic anion?
Correct Answer
Option D is the correct answer.
Detailed Explanation
A polyatomic ion is a group of atoms with a charge. OH- (hydroxide) is composed of an oxygen and a hydrogen atom and carries a negative charge, making it a polyatomic anion. Na+ is a monatomic cation. NH4+ is a polyatomic cation. Cl- is a monatomic anion.
Hint
Identify the option that consists of more than one atom and has a negative charge.