Question

what is the name of so₃?
○ sulfite ion
○ sulfur trioxide
○ sulfur oxide
○ sulfate ion

Explanation:

To name the compound \( \text{SO}_3 \), we use the rules for naming molecular compounds. The first element is sulfur (S), and the second is oxygen (O). For the number of oxygen atoms (3), we use the prefix "tri-". So it's sulfur trioxide. Sulfite ion is \( \text{SO}_3^{2-} \), sulfur oxide is too vague, and sulfate ion is \( \text{SO}_4^{2-} \).

Answer:

B. sulfur trioxide (assuming the options are labeled with letters, with "sulfur trioxide" as the correct one)