1. Helium Proton number: 2 Atomic mass: 4 Electron config: 2
Bio: Helium
Proton number: 2
Atomic mass: 4
Electron config: 2
Uses: Used in balloons and airships. It is much less dense than air, so balloons filled with it float upwards.
Helium

2. Bio: NEON
Proton number: 10
Atomic mass: 20
Electron config: 2,8
Used in advertising signs, it glows when electricity is passed through it. Different coloured neon lights can be made by coating the inside of the glass tubing of the lights with other chemicals.
Neon
Fastfood and in signs

3. Bio:
Proton number: 18
Atomic mass: 40
Electron config: 2,8,8
Used in light bulbs. The very thin metal filament inside the bulb would react with oxygen and burn away if the bulb were filled with air instead of argon. Argon stops the filament burning away because it is unreactive.
Argon

4. Bio:
Proton number: 36
Atomic mass: 84
Electron config: 2,8,18,8
Used in lasers. Krypton lasers are used by surgeons to treat certain eye problems and to remove birthmarks.
Krypton

5. Xenon Proton number: 54 Atomic mass: 131 Electron config: 2,8,18,18,8
Bio:
Proton number: 54
Atomic mass: 131
Electron config: 2,8,18,18,8
Xenon is used in flashlights and lamps and as a general anaesthetic, it is used in lasers.
Xenon

6. Bio:
Proton number: 86
Atomic mass: 222
Electron config: 2,8,18,32,18,8
Radon is extremely rare and has harmful radio-isotopes. Therefore, it is both very difficult to study and to use practically. However, it is used in some forms of aggressive cancer treatment.
Radon