Meitnerium (Mt)
Meitnerium (Mt, element 109) is a transition metal in group 9, period 7. Atomic mass 278, electron configuration [Rn] 5f¹⁴ 6d⁷ 7s², uses and facts.
About Meitnerium
Meitnerium is a transition metal with the symbol Mt and atomic number 109. Its state at room temperature is not known, because too little of it has been made, and it sits in group 9, period 7 of the periodic table. Meitnerium was discovered in 1982 by GSI Helmholtz Centre.
Meitnerium key facts
- Atomic number: 109
- Symbol: Mt
- Atomic mass: 278 u
- Category: transition metal
- Group: 9
- Period: 7
- State at room temperature: not known
- Electron configuration: [Rn] 5f¹⁴ 6d⁷ 7s²
- Electronegativity (Pauling): not assigned
- Melting point: not known
- Boiling point: not known
- Density: not known
- Common oxidation states: not known
Electron configuration
The electron configuration of meitnerium is [Rn] 5f¹⁴ 6d⁷ 7s². The part in brackets is the noble gas core; the rest shows how the outer electrons fill their subshells.
Uses of meitnerium
- Research only
Did you know?
Named after Lise Meitner, the physicist who co-discovered nuclear fission, often overlooked for the Nobel Prize.
Other elements in group 9 and neighbours
Frequently asked questions
What is the atomic number of meitnerium?
The atomic number of meitnerium is 109, which means every meitnerium atom has 109 protons.
What is the electron configuration of meitnerium?
The electron configuration of meitnerium is [Rn] 5f¹⁴ 6d⁷ 7s².
What group and period is meitnerium in?
Meitnerium is a transition metal in group 9, period 7.
What state is meitnerium at room temperature?
The state of meitnerium at room temperature is not known, because too little of it has been made.
What is meitnerium used for?
Meitnerium is used for research only.