7. A (Lower numbered levels are closer to the nucleus) (n=1 is the closest that an electron can get to the nucleus) (Decreasing levels = releasing energy) (Increasing levels = gaining energy) (The greater the change in distance, the greater the release/gain of energy)
8. C
9. A
10. B (Think of somebody jumping. They are on the ground and they can jump upwards, but they cannot jump further down. This is the lowest place they can be)
11. B (When an atom emits light, it is emitting energy. This means that an electron will have to drop down a level (or multiple levels) because it doesn't have enough energy to stay on the higher levels)
12. C
