The Noble Gases

What Elements Are Included In This Group?

• Helium
• Neon
• Argon
• Krypton
• Xenon
• Radon

What's Cool About The Noble Gases?

• Helium was the first to be discovered on the sun.
• They are extremly rare in nature.
• They do not react with other elements.

How Are They Used In The Real World?

• Argon is used in light bulbs
• Krypton and Xenon are used in lighthouses
• Helium is used to keep balloons and blimps up in the air and make them float.

Krypton

krypton has orange and green spectral lines but is colorless

Krypton

• Atomic mass - 83.798
• Atomic number - 36
• nonmetal
• density - 2155 kgm-3

- used in photographic flash units
- lighthouses
- uses electric current to produce a very bright light

Interesting Facts

• Krypton is colorless
• it was discovered in 1898
• it has no bilogical role

historical facts

• it was discovered by a scientist and his student
• comes from the greek word "Kryptos" meaning "hidden"