actinium
What is the opposite of actinium? Here is what we hold, with its meaning and related words.
Noun — A radioactive metallic chemical element with the symbol Ac and atomic number 89.
We haven't recorded synonyms for actinium yet. You can still read its full definition, where it comes from, or words that rhyme with it.
How to use actinium
The word patterns that sound natural to a native speaker.
atomic number 89
a radioactive element
found in uranium ores
the symbol Ac
It is a scientific term, used mainly in chemistry and physics.
Etymology
English borrowed it from French actinium, which is built from actin- plus the ending -ium.
Full origin of actinium →Frequently asked questions
What is actinium?
Actinium is a radioactive metallic chemical element with the symbol Ac and atomic number 89.
Where is actinium found?
It is found in uranium ores.
How do you pronounce actinium?
It is usually said ak-TIN-ee-um, with the stress on the second syllable.
