2. Noble GasesNoble Gases  Helium- Not reactive.  Neon- Not reactive.  Argon- Not reactive.  Krypton- Not reactive.  Xenon- Not reactive.  Radon- Not reactive.

3. Helium  The name “Helium” is from a Greek sun God Helios, because it was first found on the sun.  It would take 6,000 helium filled balloons to lift a 75- pound child into the air.  ¼ of the mass in the universe is made up of Helium.

4. Neon  Named after the Greek god Neos  It takes 88,000 lbs of liquefied air to produce 1 lb of neon.  Neon glows red when an electrical charge is passed through it.

5. Argon  Named after the Greek word Argos meaning inactive.  Argon is used sometimes in an inert gas shield in arc welding.  Sometimes used in florescent lights and light bulbs.

6. Krypton  Name comes from Greek work Kryptos meaning hidden.  If krypton has enough energy it could turn into a plasma.  85 Kr is an inert radioactive noble gas with a half-life of 10.76 years.

7. Xenon  Greek word Xenos meaning strange.  Used in photography flashes.  Also used in laser-pumping lamps.

8. Radon  Used to be called Niton  Was named after Latin word Nitens which means shining.  Bad Kreuznach,Germany; and the country of Japan have radium-rich springs which emit radon.