| 1 | Neon, argon, and krypton are used in lighting. | |
| 2 | The movie begins with Superman' s failed search for Krypton. | |
| 3 | K. Neon, argon, and krypton are obtained from fractional distillation of liquid air. | |
| 4 | After they are sealed up, krypton and argon gasses are pumped into the space in between. | |
| 5 | Xenon and krypton are not retained by the body so they have little effect. |