Page 29 - Curriculum Visions Dynamic Book

Key facts...
Name: bohrium
Symbol: Bh
Atomic number: 107
Atomic weight: 262
Position in Periodic Table: transition metal,
group (7) (manganese 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 Neils Bohr
Shell pattern of electrons: 2–8–18–32–32–13–2
Bk see Berkelium Bohrium (Bh)
Element 107. Has also been known as unnilseptium (Uns) and neilsbohrium (Ns). It is an artificial radioactive element belonging
to the transition metals in the Periodic Table.
It was made by fusion of an isotope of lead and chromium. Bohrium decays so rapidly that it has never been seen.
Discovery
It was discovered in 1976 at the Joint Institute for Nuclear Research in Dubna, Russia. It was confirmed by Peter Armbruster and Gottfried Münzenber
at Darmstadt, Germany, in 1981.
Synthetic bismuth crystals
Technology
Because it has only been isolated in such tiny amounts, it has no uses.
Geology
Because it is an artificial element, it does not occur naturally.
Biology
As an artificial element, it does not occur in living things.
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