109
Mt
Meitnerium
Meitnerium
Meitnerium (Mt)
Transition Metals · Solid · Period 7 · Group 9
Element Properties
- Atomic Number
- 109
- Symbol
- Mt
- Atomic Mass
- 277.154
- Category
- Transition Metals
- Standard State
- Solid
- Period
- 7
- Group
- 9
- Electronegativity
- —
- Atomic Radius
- —
- Ionization Energy
- —
- Electron Affinity
- —
- Oxidation States
- 9, 8, 6, 4, 3, 1
- Melting Point
- —
- Boiling Point
- —
- Density
- —
- Electron Configuration
- [Rn]7s2 5f14 6d7 (calculated)
- Year Discovered
- 1982
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Frequently asked questions
What is the atomic number of Meitnerium?
The atomic number of Meitnerium is 109, which equals the number of protons in its nucleus.
What is the atomic mass of Meitnerium?
The atomic mass of Meitnerium is approximately 277.154 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Meitnerium?
The electron configuration of Meitnerium is [Rn]7s2 5f14 6d7 (calculated).
Where is Meitnerium in the periodic table?
Meitnerium is located in period 7, group 9.
When was Meitnerium discovered?
Meitnerium was discovered in 1982.