Pm
INTRODUCTION
Promethium is a radioactive metallic element, and one of the rare earth elements in the lanthanide series. The most stable isotope of promethium, has a half-life of 17.7 years.
Promethium does not occur naturally on Earth. The fission of uranium produce several radioactive isotopes with atomic number 61 which make up the element promethium.
BASIC INFORMATIONS
- Atomic Number
- 61
- Atomic Mass
- 145
- Atomic radius
- N/A
- Ionization energy
- N/A
- Electronic config
- 2,8,18,23,8,2
- Principal Valency
- +2
- Density g/cm³
- N/A
- Melting point °C
- 1042
- Boiling point °C
- 3000
- Type of Element
- Metal
- Electronegativity
- N/A
- Element Category
- Lanthanide series
- Appearance
- N/A
- Block
- f-block
- Period
- 8
- Group
- 8
- No of Isotopes
- N/A
- Occurrence
- Artificially Made
- Abundance in ppm
- Nil
- Year of Discovery
- 1945
EXTRACTION
It is obtain by ion exchange process
OXIDATION STATES
+3 (Mildly basic)
MAJOR SOURCE
Radioactive process
EXAMPLES OF COMPOUND PRESENT
N/A
ECONOMIC IMPORTANCE
* Promethium metal has been used in atomic batteries and as a beta-particle source in thickness gauges.
