Potassium: Elemento chimic
Potassium es un elemento chimic de symbolo K (de kalium) e numero atomic 19.
Illo es un metallo alcalin molle argentee-blanc que es multo reactive. Potassium es necessari pro le functionamento de omne cellulas vive, e talmente 95% de su production es usate in fertilisantes.
| Argon ← Potassium → Calcium | |
| Apparentia | |
 | |
| argentee-gris | |
| Proprietates atomic | |
| Nomine, symbolo, numero | Potassium, K, 19 |
| Serie chimic | metallo alcalin |
| Gruppo, periodo, bloco | 1, 4, s |
| Configuration electronic | [Ar] 4s1 |
| Electronegativitate | 0,82 |
| Proprietates physic | |
| Stato | solido |
| Massa molar | 39,0983(1) g·mol−1 |
| Densitate | 0,862 g·cm−3 |
| Densitate liquide al p.f. | 0828 g·cm−3 |
| Puncto de fusion | 336,53 K, 63,38 °C, 146.08 °F |
| Puncto de ebullition | 1032 K, 759 °C, 1398 °F |
| Puncto triple | 336,35 K (63 °C) ? kPa |
| Calor de fusion | 2,33 kJ·mol−1 |
| Calor de vaporisation | 76,9 kJ·mol−1 |
| Calor specific | 29,6 J·mol−1·K−1 |
| Resistivitate electric | (20 °C) 72 nΩ·m |
| Conductivitate thermal | 102,5 W·m−1·K−1 |
| Expansion thermal | (25 °C) 83,3 µm·m−1·K−1 |
| Velocitate de sono | (20 °C) 2000 m·s−1 |
| Valores in unitates SI e in le conditiones normal del material (25 °C, 100 kPa) si non indica al contrario. | |
Referentias
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