Mt
Meitnerium
Atomic number: 109Mass: 278 uCategory: Unknown
About Meitnerium
Meitnerium is a synthetic element named after physicist Lise Meitner, who co-discovered nuclear fission. It is one of the heaviest synthetic elements. Only a few atoms have ever been created and it decays within milliseconds.
Properties
Period
7
Group
9
Block
D
Category
Unknown
Electronegativity
N/A
Ionization Energy
Unknown
Melting Point
Unknown
Boiling Point
Unknown
Density
37.4 g/cm³
Oxidation States
+9
Electron Configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶ 5f¹⁴ 6d⁷ 7s²
[Rn] 5f¹⁴ 6d⁷ 7s²
Shell 1:2e⁻
Shell 2:8e⁻
Shell 3:18e⁻
Shell 4:32e⁻
Shell 5:32e⁻
Shell 6:15e⁻
Shell 7:2e⁻
Real-World Uses
Research only
Nuclear physics
No practical applications
Scientific studies
Fundamental science
Fun Fact
Lise Meitner co-discovered nuclear fission but was overlooked for the Nobel Prize — element 109, meitnerium, was named in her honour decades later!