THE NOBLE GASES

Aims

• To state that these gases are found in the air

• To name the noble gases and locate them in the periodic table

• To list some of their properties

• To relate their properties to their uses

What are the names of the noble Gases?

• He• Ne• Ar• Kr• Xe• Ra

Where are these gases found in the periodic table?

Group 0

Where are they found?

What are their properties?

• Colourless

• Odourless

• Least reactive elements known

William Ramsey Nobel Prize winner for discovering the noble gases

Why were they difficult to discover?

What are they used for?

• They are used for situations where they are useful because of their lack of activity

• They don’t even join together to form molecules they exist as single atoms

Examples of their uses

• Helium used in airships and party balloons

Helium balloons

• Why do they float?

• Helium is twice as dense as hydrogen so why is it used to fill air ships?

Neon When electricity is passed through Neon it gives out a bright light

Filament lamps contain argon not air Why?

Aircraft tyres filled with argon .Why is this a good safety feature?

Xenon- produces a very bright light

QUIZ• How many noble gases are there?

• Why are they so useful?

• Give one use

• Why were they difficult to discover?

• Where are they found on Earth?