Atomic NumberAtomic Number of Potassium
Atomic Number of Potassium is 19.
Chemical symbol for Potassium is K. Number of protons in Potassium is 19. Atomic weight of Potassium is 39.0983 u or g/mol. Melting point of Potassium is 63,7 °C and its the boiling point is 774 °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Potassium
One of the vital elements for all living creatures, potassium exists in all living cells. Potassium is a very soft metal of light grey color which is very reactive with air and other chemical compounds. It is considered to be the 7th most abundant chemical element in the earth crust and it is usually processed from potassium chloride, which is quite abundant too. Potassium is essential for the cells of living organisms to maintain proper electrolyte and fluid balance. Daily dose of potassium for a human body is close to 7 grams, and we receive it mainly from foods like chocolate, nuts, bananas, potatoes, raisins, etc. This chemical element is used for producing fertilizers, and potassium also is important for producing glass. Various compounds involving potassium are heavily used in pharmaceutical industry.
Properties of Potassium Element
| Atomic Number (Z) | 19 |
|---|---|
| Atomic Symbol | K |
| Group | 1 |
| Period | 4 |
| Atomic Weight | 39.0983 u |
| Density | 0.862 g/cm3 |
| Melting Point (K) | 336.53 K |
| Melting Point (℃) | 63,7 °C |
| Boiling Point (K) | 1032 K |
| Boiling Point (℃) | 774 °C |
| Heat Capacity | 0.757 J/g · K |
| Abundance | 20900 mg/kg |
| State at STP | Solid |
| Occurrence | Primordial |
| Description | Alkali metal |
| Electronegativity (Pauling) χ | 0.82 |
| Ionization Energy (eV) | 4.34066 |
| Atomic Radius | 220pm |
| Covalent Radius | 196pm |
| Van der Waals Radius | 275 |
| Valence Electrons | 1 |
| Year of Discovery | 1807 |
| Discoverer | Davy |