Meitnerium

Document v1 · published by Koskamo · updated 2026-10-04

Meitnerium (Mt) is chemical element 109, a transition metal in group 9, period 7 (PubChem).

Atomic number: 109
Symbol: Mt
Group: 9
Period: 7
Atomic mass: 277.154 u
Electron configuration: [Rn]7s2 5f14 6d7 (calculated)
Oxidation states: 9, 8, 6, 4, 3, 1
Standard state: Solid
Chemical group: Transition metal
Year discovered: 1982

Source and provenance

Original source: pubchem.ncbi.nlm.nih.gov
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: PubChem periodic table data (NIH/NLM, pubchem.ncbi.nlm.nih.gov/ptable); group and period from Jefferson Lab via PubChem

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Version history

Published by Koskamo2026-10-04
Version 1