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Summary GCSE Chemisty Edexcel - Paper 2 - Topic 6 - Groups in the Periodic table
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Helium, Neon, Argon, Krypton, Xenon, RadonAll have a full outer shell of electrons
For every noble gas apart from Helium, there are 8 outer
electrons
In helium, there are only 2 electrons in the first shell
As the outer shell is energetically stable, they don't need to
give up or gain electrons to become more stable
This makes them 'inert', they dont react with anything.
They are non-flammable
Group 0: Noble ga
At room temperature they exist as colourless, odourless,
monatomic gases, single atoms not bonded to anything else
Noble gases are very unreactive
Argon provides an inert atmostphere in filament lamps, it stops
very hot filament from burning away
Inertness
Argon, krypton and xenon are used in flash photography, to stop
the filament burning up in high temperature falshes
Argon and helium can be used to protect metals that are being
welded. The inert atmostphere stop the hot metal reacting with Uses of noble gases
oxygen
Group 0 gases have low density
Helium is used in airships and part balloons. Helium is less
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