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The Epic Interactive Encyclopedia 1997
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unnilpentium
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1992-09-02
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A synthetically made element, symbol Unp,
atomic number 105. Credit for its discovery
(in 1970) is disputed between the USA (who
named it hahnium) and the USSR (who named it
nielsbohrium).
unnilquadium
A synthetically made element, symbol Unq,
atomic number 104. It is also named
kurchatovium and rutherfordium by teams in
the USSR and the USA respectively. It was
first synthesized in 1969.