Aktinyum 1899 yılında André-Louis Debierne tarafından keşfedilmiştir.
- Actinium was discovered by André-Louis Debierne in 1899.
Aktinyum 3,198°C derecede buharlaşır.
- Actinium vaporizes at 3,198°C.
... Act in terms of what's going to be good for all of us over ...
... and not act in terms of short-term political interest. ...