19 K
Alkali metal
Potassium
Vital for nerves and plants.
Properties of Potassium
- Atomic number (Z)
- 19
- Symbol
- K
- Atomic mass
- 39.098 g/mol
- Category
- Alkali metal
- Group
- 1
- Period
- 4
- Electron configuration
- [Ar] 4s¹
- Electronegativity (Pauling)
- 0.82
- Atomic radius
- 243 pm
- First ionization energy
- 419 kJ/mol
- Melting point
- 336.53 K (63.4 °C)
- Boiling point
- 1032 K (758.9 °C)
- Density
- 0.862 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1807
Frequently asked questions
What is Potassium?
Potassium (K) is an alkali metal, element number 19 on the periodic table. Vital for nerves and plants.
What is the atomic number and atomic mass of Potassium?
Potassium has atomic number 19 and an atomic mass of about 39.098 g/mol.
What is the electron configuration of Potassium?
The electron configuration of Potassium is [Ar] 4s¹.
Where is Potassium on the periodic table?
Potassium sits in group 1, period 4, and is classified as a alkali metal.