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KB Term:
Unnilpentium
Sigma KEE - Unnilpentium
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unnilpentium
Radioactive transactinide element. Half-life of 1.6s. Discovered in 1970 by Berkeley researchers. So far, seven isotopes have been discovered.
Relationships
Parents
elemental substance
The
Class
of
PureSubstance
s that cannot be separated into two or more
Substance
s by ordinary chemical (or physical) means. This excludes nuclear reactions.
ElementalSubstance
s are composed of only one kind of atom. Examples: Iron (Fe), copper (Cu), and oxygen (O_2).
ElementalSubstance
s are the simplest
PureSubstance
s.
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