6.4 Group 0

Question 1

What are group 0 elements called?

Answer 1

Noble gases

Question 2

List the elements of group 0 (lightest to heaviest)

Answer 2

Helium (He)

Neon (Ne)

Argon (Ar)

Krypton (Kr)

Xenon (Xe)

Radon (Rn)

Question 3

What are the properties of noble gases?

Answer 3

Inert (not reactive, due to full outer shells)

Non-flammable (won’t set on fire)

Exist as monatomic gases (single atoms not bound to anything else)

Low density (helium and neon are less dense than air)

Question 4

Name some uses of noble gases

Answer 4

1. Used as a gas in filament light bulbs (non-reactive, so they won’t cause the filament to burn) - argon used for this
2. Flash photography (stops flash filament from burning) = argon, krypton and xenon used for this
3. To protect metals that are being welded (prevents metals reacting with oxygen) - argon and helium used for this
4. Party balloons and airships (helium used as it is less dense than air)

Question 5

What happens to the meltingboiling points of noble gases as you go down the group?

Answer 5

Melting/boiling points increase as the elements get larger