Praseodymium es un elemento chimic de symbolo Pr e numero atomic 59.
Cerium ← Praseodymium → Neodymium | |
Apparentia | |
grisesc blanc | |
Proprietates atomic | |
Nomine, symbolo, numero | Praseodymium, Pr, 59 |
Serie chimic | lanthanido |
Gruppo, periodo, bloco | 3, 6, f |
Configuration electronic | [Xe] 6s2 4f3 |
Electronegativitate | 1,13 |
Proprietates physic | |
Stato | solido |
Massa molar | 140,90765 g·mol-1 |
Densitate | 6,77 g·cm-3 |
Densitate liquide al p.f. | 6,50 g·cm-3 |
Puncto de fusion | 1208 K, 935 °C, 1715 °F |
Puncto de ebullition | 3793 K, 3520 °C, 6368 °F |
Calor de fusion | 6,89 kJ·mol-1 |
Calor de vaporisation | 331 kJ·mol-1 |
Calor specific | 27,20 J·mol-1·K-1 |
Resistivitate electric | (t.a.) (α, poly) 700 nΩ·m |
Conductivitate thermal | 12,5 W·m-1·K-1 |
Expansion thermal | (t.a.) (α, poly) 6,7 µm·m-1·K-1 |
Velocitate de sono | (20 °C) 2280 m·s−1 |
Valores in unitates SI e in le conditiones normal del material (25 °C, 100 kPa) si non indica al contrario. | |
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