Question 13
What kind of ions and oxides do non-metals form?
The right answer is the one marked above.
Non-metals form negative ions — anions — and the oxides they form with oxygen are mostly acidic oxides. Those are often gases, and they dissolve in water to form acids.
Point for point this is the mirror image of the metals, which form positive ions and basic oxides. Non-metals sit on the right of the table, where electronegativity is highest — they pull electrons in rather than giving them away.