Noble Gases

Elements

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

Facts

• Nobel gases do not react with other elements due to the fact they have 8 valance electrons
• They are extremly rare
• Helium was the first one to be discovered and it was found on the sun
• Helium was named after the Greek word 'Helios' which means sun

Examples in the World

• Nobel gases are used to dilute oxygen in the gas tanks of divers
• They are used to fill light bulbs
• Since they don't react with medal at high tempuratures, they are used in arc welding

Argon

Physical Characteristics

• Colorless
• Odurless
• Found in the atmosphere
• Does not form chemical compounds
• Heavier than air
• Not reactive

Information

• Atomic Number: 18
• Atomic Mass: 39.948
• Argon is a nonmetal
• Density: 1.784 g/L. It would sink in water

In the Real World

• Argon is found in small parts of the atmosphere
• It is used to fill flourescent light bulbs
• It is found in the air as a byproduct of the separation of the air

Facts

• Argon makes up less than 1% of the air
• There is no biological role for argon
• The melting point of argon is 83.8 K which is -308.7 F

Historical Facts

• Argon was discovered by Lord Rayleigh and Sir William Ramsay in 1894 in London
• The name they gave the element was 'argos' meaning inactive due to the fact it does not react with other elements