Compare Elements
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K
Potassium
#19 · Alkali Metal
| Mass | 39.098 u |
| Density | 0.862 g/cm³ |
| Melting | 336.53 K |
| Boiling | 1032.0 K |
| Electronegativity | 0.82 |
| Ionization Energy | 418.8 kJ/mol |
| Atomic Radius | 227.0 pm |
| Block | s-block |
| State (RT) | Solid |
| Config | [Ar] 4s1 |