FANDOM


Ellesmere

The BasicsEdit

There's not much new to add about Noble Gases that you didn't learn at GCSE.

They have full outer-shells so they have little reason to either exchange or share electrons.

So Ionic Bonding and Covalent bonding shouldn't happen.

This is true for Neon and Helium, where the electrons are very close to the nucleus and very poorly shielded.

It's possible but difficult to make compounds from the others, but this is highly unlikely to appear in an exam question.

Noblegas

Exam HintEdit

  • You're most likely to be asked why Noble Gases don't form compounds.
  • A one mark question could be answered with "Full outside shell", a two mark answer might require you to explain why this makes bonding unlikely. (See above)
  • You might be asked for a use for some
Helium Airships, (party balloons at a push).
Neon Colourful advertising signs.
Argon welding, old-fashioned lightbulbs.
Krypton lasers
  • Though Argon makes up 0.9% of dry air, the other Noble gases are vanishingly rare and are generally separated from air by cooling until they condense at different temperatures - this is still Fractional Distillation though in a rather different form to the Fractional Distillation you met in the Hydrocarbons topic