noble gases Flashcards
1
Q
what colour are noble gases
A
colourless
2
Q
why don’t noble gases react much at all
A
because they have a full outer shell so they don’t easy give up or gain electrons
3
Q
since noble gases are inert they’re non flammable. true or false?
A
true
4
Q
3 properties of helium
A
1) very low density
2) used in balloons e.g party
3) non flammable = safe
5
Q
3 properties of neon
A
1) gives off bright light when current passed through
2) used in bright signs
3) used in lazers
6
Q
3 properties of argon
A
1) unreactive
2) used in light bulbs
3) protects metals being welded