19
K
Potassium
Potassium
Potassium (K)
Alkali Metals · Solid · Period 4 · Group 1
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Element Properties
- Atomic Number
- 19
- Symbol
- K
- Atomic Mass
- 39.0983
- Category
- Alkali Metals
- Standard State
- Solid
- Period
- 4
- Group
- 1
- Electronegativity
- 0.82
- Atomic Radius
- 275
- Ionization Energy
- 4.34
- Electron Affinity
- 0.5
- Oxidation States
- +1
- Melting Point
- 336.53 K (63.38 °C)
- Boiling Point
- 1032 K (758.85 °C)
- Density
- 0.89
- Electron Configuration
- [Ar]4s1
- Year Discovered
- 1807
Frequently asked questions
What is the atomic number of Potassium?
The atomic number of Potassium is 19, which equals the number of protons in its nucleus.
What is the atomic mass of Potassium?
The atomic mass of Potassium is approximately 39.0983 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Potassium?
The electron configuration of Potassium is [Ar]4s1.
Where is Potassium in the periodic table?
Potassium is located in period 4, group 1.
When was Potassium discovered?
Potassium was discovered in 1807.
Related elements
Same group
1
H
Hydrogen
1.008
3
Li
Lithium
7
11
Na
Sodium
22.99
37
Rb
Rubidium
85.468
55
Cs
Cesium
132.905
87
Fr
Francium
223.02