The Periodic Table/61 - Promethium (Pm)

Element Promethium (Pm, 61)

Here you can read more about the chemical element Promethium. Its shemical symbol is Pm and its atomic number is 61. The relative atomic mass of Promethium is 145 u. The elemental classification of Promethium is Lanthanides, and it belongs to group 3 and period 6 in the Periodic Table of Elements.

The density of Promethium is 7264 kg/m3. The melting point of Promethium is 1373 Kelvin (1100 ℃). The boiling point of Promethium is 3273 Kelvin (3000 ℃). Promethium was discovered in the year 1942 by Chien Shiung Wu, Emilio Segr√® and Hans Bethe.

To the right (or below if you are using a mobile device with a smaller screen) you will find the information given above for the element Promethium ordered in tabular form, which might be easier to read and use if you want to quantify it in some sort.


Data about element Promethium

Chemical symbol
Pm
Element classification
Lanthanides
Atomic number
61
Group
3
Period
6
Relativ atomic mass
Atomic mass
145 u
Density
7264 kg/m3
Melting point
1373 K   (1100 ℃)
Boiling point
3273 K   (3000 ℃)
Discovered year
1942
Discovered by
Chien Shiung Wu, Emilio Segrè och Hans Bethe