Atomic mass, symbol and atomic number
fermium is an artificially created element with the element symbol Fm and atomic number 100. In the periodic table it belongs to the actinoids with an atomic mass of 257.09 u. The chemical element discovered by Glenn T. Seaborg in 1952 is radioactive and is in a solid state of aggregation at room temperature.
Profile: Fermium (English Fermium)
|explorers:||Glenn T. Seaborg|
|Year of discovery:||1952|
|Atomic mass:||257,09 u|
|Van der Waals radius:||unknown|
|Electron configuration:||Rn 5f12 7s2|
|ionization:||627 kJ / mol|
|Heat of fusion:||unknown|
|Heat of vaporization:||unknown|
Did you know that ...
- Fermium could be detected for the first time after the explosion of a hydrogen bomb?
- the shortest-lived isotope of Fermium (259Fm) has a half-life of only 1.5 s?
- Fermium was named after the nuclear physicist Enrico Fermi, who himself is not the discoverer of the chemical element?