Atomic NumberAtomic Number of Promethium
Atomic Number of Promethium is 61.
Chemical symbol for Promethium is Pm. Number of protons in Promethium is 61. Atomic weight of Promethium is 145 u or g/mol. Melting point of Promethium is 1080 °C and its the boiling point is 2730 °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Promethium
Promethium is an artificially produced chemical element which is a radioactive metal. The name of this element originates from the name of the ancient Greek god Prometheus who stole fire from Gods and gave it to humans. This element is mostly used for research or in some industries related to nuclear power and radioactivity. Promethium can be used in atomic batteries, illuminated clocks, or in special x-ray devices. It has no biological role and is harmful to all living organisms. It was discovered that there is an abundance of this element in one star system in Andromeda galaxy.
Properties of Promethium Element
| Atomic Number (Z) | 61 |
|---|---|
| Atomic Symbol | Pm |
| Group | |
| Period | 6 |
| Atomic Weight | 145 u |
| Density | 7.26 g/cm3 |
| Melting Point (K) | 1315 K |
| Melting Point (℃) | 1080 °C |
| Boiling Point (K) | 3273 K |
| Boiling Point (℃) | 2730 °C |
| Heat Capacity | |
| Abundance | 2×10−19 mg/kg |
| State at STP | Solid |
| Occurrence | Transient |
| Description | Lanthanide |
| Electronegativity (Pauling) χ | no data |
| Ionization Energy (eV) | 5.582 |
| Atomic Radius | 185pm |
| Covalent Radius | no datapm |
| Valence Electrons | 2 |
| Year of Discovery | 1945 |
| Discoverer | Marinsky and Glendenin |