Stable isotope Meitnerium (Mt)

Isotope Atomic Mass Half-life Mode of Decay
Mt-265  266.1366 No data available No data available
Mt-266  266.13764 0.0034 seconds α to Bh-262; SF
Mt-267  267.1375 No data available No data available
Mt-268  268.1388 0.070 seconds α to Bh-264
Mt-269  269.1391 No data available No data available
Mt-270  270.1407 No data available No data available
Mt-271  271.1412 No data available No data available
Mt-275  275 0.0097 seconds α to Bh-271
Mt-276  276 0.72 seconds α to Bh-272

Properties of Meitnerium

Name Meitnerium
Symbol Mt
Atomic number 109
Atomic weight 276
Standard state Presumably a solid at 298 °K
CAS Registry ID 54038-01-6
Group in periodic table 9
Group name None
Period in periodic table 7
Block in periodic table d-block
Color Unknown, but probably metallic and silvery white or grey in appearance
Classification Metallic
Melting point No data available
Boiling point No data available
Density of solid 28.2 g/cm3 (predicted)
Electron configuration [Rn]5f146d77s2 (calculated)
Most stable oxidation states +1, +3, +6 (predicted)