Noble Gases

Question 1

properties

Answer 1

• unreactive
• full outer shells
• gases
• exist as single atoms: MONATOMIC
• colourless but light up when an electric current is passed through them

Question 2

uses

Answer 2

helium: balloons
neon: neon lights, red tube lights
argon: in lamps and lightbulbs

Question 3

some food packets contain argon gas, why?

Answer 3

• it prevents oxygen reacting with the crisps, as they are so unreactive

argon is used because it is the most abundant