Meitnerium
Transition Metal
Meitnerium (Mt) is a chemical element with atomic number 109, classified as a transition metal. At room temperature it is a solid. It was discovered in 1982 by Gesellschaft für Schwerionenforschung (GSI).
Properties
- Atomic number
- 109
- Atomic mass
- 278 u
- Category
- Transition Metal
- Group
- 9
- Period
- 7
- Block
- d-block
- Electron configuration
- [Rn] 5f¹⁴ 6d⁷ 7s²
- Phase at STP
- Solid
- Density
- 37.4 g/cm³
- Melting point
- —
- Boiling point
- —
- Electronegativity
- —
- Atomic radius
- —
- Ionization energy
- —
- Discovery
- 1982 · Gesellschaft für Schwerionenforschung (GSI)
Common uses
Research only
Did you know?
Named after Lise Meitner, physicist who discovered nuclear fission.