Group 0(Noble Gas)

1.The noble gases are all unreactive gases because they have full outer shells of electrons.

2.They are all monatomic gases(each molecule consists of a single atom)

3.Some important uses of noble gases:

-Helium is used in balloons because it has a low density.

-Argon and neon are used in light bulbs because they are unreactive and so protect the white-hot filament from reaction with air.

-Argon is used in the extraction and welding of some metals because it is unreactive and so protects the hot metal from reaction from oxygen in the air.

Helium,Atomic number:2
Electronic Configuration:2

Neon,Atomic number:10
Electronic Configuration:2,8

Argon,Atomic number:18
Electronic Configuration:2,8,8

Krypton,Atomic number:36
Electronic Configuration:2,8,18,8

Xenon,Atomic number:54
Electronic Configuration:2,8,18,18,8

Radon,Atomic number:86
Electronic Configuration:2,8,18,32,18,8

-They are all colourless.The forces between the atoms are very weak and so are all gases.

-Going down the group,from helium to radon, the density increases and the melting and boiling point increases.This is because the atoms become heavier and require more energy to melt or boil.