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Meitnerium (Mt)
Atomic number: 109 · Category: unknown, probably transition metal · Group 9 · Period 7 · Phase: Solid
Meitnerium is a chemical element with symbol Mt and atomic number 109. It is an extremely radioactive synthetic element (an element not found in nature that can be created in a laboratory). The most stable known isotope, meitnerium-278, has a half-life of 7.6 seconds.
Block: d
CPK color:#eb0026
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d7
Configuration (semantic): *[Rn] 5f14 6d7 7s2
Shells: 2, 8, 18, 32, 32, 15, 2
Periodic position
Group: 9
Period: 7
xpos: 9
ypos: 7
Spectral/Bohr images
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3D Model