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radioactinium
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Contents
1
English
1.1
Etymology
1.2
Noun
1.2.1
Synonyms
English
edit
Etymology
edit
From
radio-
+
actinium
.
Noun
edit
radioactinium
(
uncountable
)
(
physics
)
The
radioactive
isotope
of
actinium
,
227
89
Ac, having a
half-life
of 21.7 years
Synonyms
edit
actinium-227
Categories
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English terms prefixed with radio-
English lemmas
English nouns
English uncountable nouns
en:Isotopes
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