Facts

Promethium, in its natural state, is a solid.
The salts glow light green and blue in the dark.

Atomic Mass

145

Atomic Number

61

Melting Point

1441 K

Boiling Point

3000 K

Density @ 293 K

6.475 g/cm³

Natural Abundance

~ 0 %

Configuration

[Xe]6s²4f⁴

Group

Inner Transition Metals (Lanthanide Series)

Valence Electrons

6

Protons/
Electrons

61

Neutrons

86

Chemical Properties

Radioactive: Soft beta emitter
Solid at room temp

Tends to react with:

Chlorine, Oxygen, Nitrogen

Production: How it is obtained

¹⁴⁶Nd(h,g)^147>Nd --> ¹⁴⁷Pm + B^-

Atomic Mass	145
Atomic Number	61
Melting Point	1441 K
Boiling Point	3000 K
Density @ 293 K	6.475 g/cm³
Natural Abundance	~ 0 %
Configuration	[Xe]6s²4f⁴
Group	Inner Transition Metals (Lanthanide Series)
Valence Electrons	6
Protons/ Electrons	61
Neutrons	86
Chemical Properties	Radioactive: Soft beta emitter Solid at room temp
Tends to react with:	Chlorine, Oxygen, Nitrogen
Production: How it is obtained	¹⁴⁶Nd(h,g)^147>Nd --> ¹⁴⁷Pm + B^-