Meitnerium is a synthetic chemical element with atomic number 109 and symbol Mt in the periodic table. It was first created by a German Research team lead by Gottfried Munzenberg and Peter Armbruster at Gesellschaft fur Schwerionenforschung in the year 1982. Meitnerium is a D-block transactinide element, which is a member of the 7th period and arranged in the group 9 elements in the periodic table. It is predicted to have similar properties as that of its lighter homologous, rhodium, cobalt, and iridium.
Meitnerium does not possess any naturally occurring or stable isotopes. Many radioactive isotopes have been made in the laboratory, either by observing the decay of heavier metals or by fusing two atoms. These kinds of elements are always prepared artificially as they never occur naturally in the Earth’s Crust. As it can never present in the Earth’s crust, there is no need to worry about health effects of it.
Characteristics of Meitnerium
- Meitnerium is expected to be a solid under normal conditions and assume a face-centered cubic crystal structure, similarly to its lighter congener iridium.
- It should be a very heavy metal with a density of around 37.4 g/cm3, which would be the second-highest of any of the 118 known elements, second only to that predicted for its neighbor hassium (41 g/cm3).
- It is the seventh member of the 6d series of transition metals. Since element 112 (copernicium) has been shown to be a group 12 metal, it is expected that all the elements from 104 to 111 would continue a fourth transition metal series, with meitnerium as part of the platinum group metals.
- Calculations on its ionization potentials and atomic and ionic radii are similar to that of its lighter homologue iridium, thus implying that meitnerium’s basic properties will resemble those of the other group 9 elements, cobalt, rhodium, and iridium.