actinium
ac-tin-i-um
noun
A rare, radioactive metallic chemical element, symbol Ac, atomic number 89.
"Actinium is used as a neutron source in some applications."
Thesaurus
Synonyms: Ac, atomic number 89
ac-tin-i-um
A rare, radioactive metallic chemical element, symbol Ac, atomic number 89.
"Actinium is used as a neutron source in some applications."
Synonyms: Ac, atomic number 89