Potassium
| Basic Information | Crystal Structure | Isotope | Facts | Related Links |
| Symbol: | K |
| Atomic Number: | 19 |
| Atomic weight: | 39.0983u |
| Melting Point: | 336.35K |
| Boiling Point: | 1032K |
| Number of Protons/Electrons: | 19 |
| Number of Neutrons: | 20 |
| Classification: | Alkali Metal |
| Crystal Structure: | Body centered cubic |
| Density | 0.86g/mL |
| Color: | Silvery |
| Bonding radius: | 2.03A |
| Atomic radius: | 2.77A |
| Ionization Potential: | 4.341V |
| Electronegativity: | 0.82 |
| Heat of vaporization: | 79.87kJ/mol |
| Heat of fusion: | 2.334kJ/mol |
| Specific heat: | 0.75J/gK |
| Electron configuration: | [Ar]4s1 |
Crystal Structure
| Isotope | Half Life |
| K39 | Stable |
| K40 | 1.28E9 years |
| K41 | Stable |
| K42 | 12.4 hours |
| K43 | 22.3 hours |
| Date of Discovery: | 1807 |
| Discoverer: | Sir Humphrey Davy |
| Uses: | glass, soap |
| Obtained From: | minerals (carnallite) |