atomic_number_89 (HyperDic hyper-dictionary)

English > 1 sense of the expression *atomic number 89*:
NOUN	substance	atomic number 89, actinium, Ac	a radioactive element of the actinide series

English > *atomic number 89*: 1 sense > noun 1, substance
Meaning	A radioactive element of the actinide series; found in uranium ores.
Synonyms	actinium, Ac
Broader	chemical element, element	Any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
Substance of	uranium ore	Any ore from which uranium can be extracted
Spanish	actinio, número atómico 89
Catalan	Ac, actini, número atòmic 89

HyperDic: atomic_number_89