Group 8/0 - Topic 6 Flashcards
1
Q
Why are noble gases chemically inert?
A
- They have full outer shells so 8 electrons in their outer shell (except helium, which has 2- but this shell is still full)
- Their electronic configurations demonstrate their full outer shells and this makes them unreactive with other elements because they are very stable
2
Q
Symbol for helium:
A
He
3
Q
Electronic configuration of helium:
A
2
4
Q
Uses of helium + explanation:
A
- airships - low density, less dense than air
- MRI - doesn’t dissolve in water
5
Q
Symbol for neon:
A
Ne
6
Q
Electronic configuration of neon:
A
2, 8
7
Q
Uses of neon + explanation:
A
- neon lights - gas glows when current passes through it
- luminous tubing
8
Q
Symbol for argon:
A
Ar
9
Q
Electronic configuration of argon:
A
2,8,8
10
Q
Uses of argon + explanation:
A
- light bulbs
- protects filament from reacting with O2/N as it is inert so doesn’t react with wire and can get hot with combusting, stops filament burning away as it is inert and not flammable
- argon is used in light bulb as it is inert meaning it is unreactive due to it being noble gas and have a full outer shell (stable electronic structure) - so doesn’t need to go gain/lose/transfer/share any electrons as it doesn’t need to form any bonds to gain a full outer shell
- welding - to create inert environment to prevent metal reacting with O2
11
Q
Symbol for krypton:
A
Kr
12
Q
Electronic configuration of krypton:
A
2,8,18,18,8 or 2,8,8,18
13
Q
Uses of krypton + explanation:
A
- used to generate lasers
- light bulbs
- protects filament from reacting with O2/N as it is inert so doesn’t react with wire and can get hot without combusting, stops filament burning away as it is inert and not flammable, unreactive with hot metal filament
- as it is inert meaning it is unreactive due to it being noble gas and have a full outer shell (stable electronic structure) - so doesn’t need to go gain/lose/transfer/share any electrons as it doesn’t need to form any bonds to gain a full outer shell
14
Q
Symbol for xenon:
A
Xe
15
Q
Electronic configuration of xenon:
A
2,8,18,18,8