Chemistry (paper 2) 📍 Flashcards
1
Q
What are group 1 elements called?
A
Alkali metals
2
Q
What are group 7 elements called?
A
Halogens
3
Q
What are group 0 elements called?
A
Noble gases
4
Q
Inert meaning
A
Unreactive
5
Q
Noble gas characteristics
A
• Exist as single atoms
• Have a full outer shell = stable arrangement of electrons
• Therefore they’re inert and don’t easily form molecules
6
Q
What is helium used for and why?
A
• Useful for airships
• Has a very low density and is non-flammable
7
Q
What is neon used for and why?
A
• Useful for making illuminated signs
• Neon produces red/orange light when electricity is passed through it
