Group 8A: Noble Gases

1. Neon and _______ are the most often used in neon lights.
4. Some colors can be produced by adding a bit of ______ to the noble gas.
5. Noble gases have the ________ ionization energies.
9. How often do noble gases form compounds?
10. Noble gases are used in ___________ bulbs, strobe lights, and headlights.
12. What element is separated from natural gases?
15. There are _____ than 100 known compounds of fluorine and xenon.
16. Helium has a ____ density.
17. All Group 8A elements are _______ gases at room temperature.

1. A bicycle frame is made out of steel or aluminum _____ tubes that can be joined together.
2. What gases are colorless, odorless, and tasteless?
3. Neon, argon, krypton, and xenon are separated from air by _______ distillation.
6. Xenon-ion engine is a good choice for lengthy ______ missions.
7. Helium is used in _______ weather.
8. The position of a satellite may be maintained by a xenon-ion _________ system.
11. Xenon-ion engine produce a relatively _____ amount of thrust.
13. What kind of helium cools the magnets used for magnetic resonance imaging?
14. The first _________ of a noble gas was made in 1962.
18. All noble gases emit visible light when their _____ are excited.
19. Each noble gas emits a characteristic _____ in a gas discharge tube.