Atomic number 18Ar
Argon
আর্গন
- Noble gas
- Group 18
- Period 3
- Atomic mass 39.950 u
- Gas
- Electrons per shell
- 2, 8, 8
- Electron configuration
- 1s2 2s2 2p6 3s2 3p6
- Nucleus
- 18 protons, 22 neutrons
- Valence electrons
- 8
Speed1×
- Group
- 18
- Period
- 3
- Block
- p-block
- Category
- Noble gas
- State at 25 °C
- Gas