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Periodic Table

Picture of  Promethium

 Atomic No. Order:

 Alphabetic Order:

Ground State Electron Configuration of  Promethium
Symbol: Pm
Atomic Number: 61
Atomicmass: (147) g.mol -1
Electronegative (According to Pauling): unknown
Density: 6.475 g.cm-3 at 20°C
Melting Point: 1168 °C
Boiling Point: 2460 °C
Venderwaals Radius: unknown
Ionic Radius: unknown
Isotopes: 9
Electronic Shell: [ Xe ] 4f5 6s2
Energy Of First Ionization: 534.6 kJ.mol -1  


No of Protons
Standard Potential: - 2.42 V

Electron in Full Shell
Discoverd By: Discovered by Marinsky in 1945

Electron in Partial Shell

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