1. The chemistry of heavier noble gases , krypton and xenon, are well established. 2. Noble gases are typically highly unreactive except when under particular extreme conditions.3. The noble gases are colorless, odorless, tasteless, and nonflammable under standard conditions. 4. Noble gases are considered stable since they contain the desired eight electrons.5. Other separations include noble gases , N 2, O 2, freon and formaldehyde. 6. Krypton, like the other noble gases , is used in lighting and photography. 7. Neon and other noble gases have characteristic emission frequencies ( colors ). 8. The heavier noble gases have more electron shells than the lighter ones. 9. Can noble gases form compounds under extreme conditions of temprature and pressure? 10. All of the noble gases have full outer shells with eight electrons. 
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