Atomic number 19K
Potassium
পটাশিয়াম
- Alkali metal
- Group 1
- Period 4
- Atomic mass 39.098 u
- Solid
- Electrons per shell
- 2, 8, 8, 1
- Electron configuration
- 1s2 2s2 2p6 3s2 3p6 4s1
- Nucleus
- 19 protons, 20 neutrons
- Valence electrons
- 1
Speed1×
- Group
- 1
- Period
- 4
- Block
- s-block
- Category
- Alkali metal
- State at 25 °C
- Solid