Thorium ← Protactinium → Uranium
|
Apparentia
|
lustro brillante argentee metallic
|
Proprietates atomic
|
Nomine, symbolo, numero
|
Protactinium, Pa, 91
|
Serie chimic
|
actinido
|
Gruppo, periodo, bloco
|
3, 7, f
|
Configuration electronic
|
[Ra] 7s2 5f2 6d1
|
Electronegativitate
|
1,5
|
Proprietates physic
|
Stato
|
solido
|
Massa molar
|
231,03588 g·mol-1
|
Densitate
|
15,37 g·cm-3
|
Puncto de fusion
|
1841 K, 1568 °C, 2854 °F
|
Puncto de ebullition
|
4300? K, 4027? °C, 7280? °F
|
Calor de fusion
|
12,34 kJ·mol−1
|
Calor de vaporisation
|
481 kJ·mol-1
|
Calor specific
|
26,230 J·mol-1·K-1
|
Resistivitate electric
|
(0 °C) 177 nΩ·m
|
Conductivitate thermal
|
47 W·m-1·K-1
|
Isotopos
|
Iso. |
AN |
Semivita |
MD |
ED (MeV) |
PD
|
231Pa
|
~100%
|
32760 a
|
α
|
5,149
|
227Ac
|
|
Valores in unitates SI e in le conditiones normal del material (25 °C, 100 kPa) si non indica al contrario.
|
|
Protactinium es un elemento chimic de symbolo Pa e numero atomic 91.
Nota