Group 18Noble Gases

By: Sarah Whitaker and Landon Hanna

Noble Gases

• Block- PValence shell electron configurationHelium-S2

Neon-S2p6

Argon-S2p6

Krypton-S2p6

Xenon-S2p6

Radon-S2p6

The VSEC affects the Properties: It makes them very stable

Properties

• Odorless• Colorless • Tasteless • Stable and non-reactivity • They are six naturally occurring elements• Are liquids over a very small temperature range• Have been involved in lighting, welding and space

exploration. Helium is also in tanks for scuba diving• Change in properties: Radon is radioactive.

Krypton

• Discovered by Sir William Ramsay, a Scottish chemist and Morris M. Travers, an English chemist in 1898.

• Sources: One pound per meter in air

• Uses: in photographic flashes for high speed photography

• Unique: in 1960, the length of the meter was defined in terms of the orange-red spectral line of Krypton-86.

Helium

• Discovered by: Jules-Cesar Janssen, a French astronomer in 1868.

• Sources: Natural air • Uses: Breathing, filling

balloons • Unique: Helium is the

second most abundant element in the universe