PERIODIC TABLE

Promethium

Atomic No. 61 Pm Promethium

About Promethium

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Properties

Atomic Number
61
Atomic Symbol
Pm
Atomic Mass
145
CAS No.
7440-12-2
Density
7.264 g/cm³
Series
lanthanoid
Melting Point
1,100°C
Boiling Point
3,000°C
Thermal Conductivity
0.15 W/cm °C
Heat of Fusion
7.7 kJ/mol
Heat of Vaporization
290 kJ/mol
Electrical Conductivity
1.3×106 S/m

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