Fermium (Fm), element 100 – Learn Acer periodic table

Fermium

Actinide, atomic number 100.

Fermium is a synthetic element with symbol Fm and atomic number 100. It is a member of the actinide series. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities, although pure fermium metal has not yet been prepared.

Facts

Symbol Fm. Atomic mass 257.0 u. Group 3, period 7. Electron configuration [Rn] 5f12 7s2. Electrons per shell 2, 8, 18, 32, 30, 8, 2. State at room temperature: Solid. Melting point 1526.8 °C, boiling point unknown. Discovered by Lawrence Berkeley National Laboratory.

Element data from Wikipedia, CC BY-SA 3.0.