Element Search
Potassium (19K39.0983)
[7440-09-7]
[7440-09-7]
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Elemental Form| Potassium is silvery-white, soft, and light. It is the second lightest known metal (lithium is the first). Never found native, potassium is found in minerals in most soils. It is an essential componenet for plant growth and in human and animal nutrition. Since it is one of the most electropositive metals, potassium is very reactive. Like other alkali metals, it decomposes and can ignite spontaneously in water. | ||||
| Melting Point | 63.3°C | Boiling Point | 760°C | |
| Density | 0.856g/cm3 | Themal Conductivity | 0.24cal/cm2/cm/s/°C | |
| Specific Heat @ 25°C | 0.177cal/g°C | Heat of Fusion | 14.6k-cal/g-atom | |
| Heat of Vaporization | 496.0k-cal/g-atom | Atomic Volume | 45.3W/D | |
| First Ionization Energy | 100K-cal/g-mole | Electronegativity | 0.8Pauling's | |
| Covalent Radius | 2.03Angstroms | Mohs Hardness @ 20°C | 0.5 | |
| Electrical Resistivity @ 200°C | 21.85µΩ-cm | Crystal Structure | Cubic, body centered | |
