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?