Page 31 - Curriculum Visions Dynamic Book

Md see Mendelevium
Meitnerium (Mt)
Element 109.Also formerly
called unnilennium (Une). It is
an artificially produced radioactive element belonging to the transition metals in the Periodic Table. It is
a transuranium element. Only a single nucleus of the element has so far been identified.
Discovery
It was discovered in 1982 at the Institute for Heavy Ion Research in Germany, when bismuth 209 was bombarded with iron 58 ions.
Technology
It has no uses.
Geology
Because it is an artificial element, it is not found in the environment.
Biology
It is not found in living things.
Key facts...
Name: Meitnerium
Symbol: Mt
Atomic number: 109
Atomic weight: 266
Position in Periodic Table: transition metal,
group (9) (cobalt group); period 7 State at room temperature: solid Colour: unknown
Density: n/a
Melting point: n/a
Boiling point: n/a
Origin of name: named after Lise Meitner, the
Austrian physicist
Shell pattern of electrons: 2–8–18–32–32–15–2
Manganese oxide (MnO2), carbon black, and ammonium chloride (NH4Cl)
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