Group 0 (Noble Gases) Flashcards

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What is Group 0 in the Periodic Table also called?

The noble gases.

Name three noble gases.

Helium, neon and argon.

How many electrons do noble gases have in their outer shell?

Eight, except helium which has two.

Why are noble gases very unreactive?

They have a full outer shell of electrons. This makes them stable, so they do not gain or lose electrons.

Do noble gases exist as single atoms or as molecules?

Single atoms.

What state are noble gases in at room temperature?

They are colourless gases.

What happens to the boiling points of noble gases as you go down Group 0?

The boiling points increase.

Why do boiling points increase down Group 0?

The atoms get bigger with more electrons, so the forces between atoms are stronger. More energy is needed to boil them.

Where are the noble gases found on the Periodic Table?

In the far right column, called Group 0.

Why is helium used in balloons and airships?

It is less dense than air and is non-flammable.

Why is argon used in welding and in filament lamps?

It is an unreactive gas, so it gives a safe atmosphere and stops hot metal or the filament reacting with oxygen.

How does the density of noble gases change down the group?

It increases. Heavier noble gases are denser than lighter ones like helium.

Revision Notes
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