Promethium is a radioactive lanthanide with no stable isotopes and only limited specialised applications.
Atomic number
61
Category
Lanthanide
Period
6
Group
f-block
State
Solid
Fun facts about Promethium
Natural promethium exists only in tiny transient quantities.
It is produced mainly from nuclear fission products for research.
Its radioactivity can excite phosphors without an external power source.
Common uses of Promethium
Research
Historical luminous sources
Specialised nuclear batteries
Where Promethium sits in the periodic table
Promethium belongs to the lanthanide series in period 6 and the f-block of the periodic table. Under the conditions represented in this reference, its state is solid.
Quick chemistry revision
For quick revision, pair the symbol Pm with atomic number 61 and the listed atomic mass [145]. The summary, facts, and uses above keep those element properties together in one reference.