Actinium (Noun)
Meaning
A radioactive element of the actinide series; found in uranium ores.
Classification
Nouns denoting substances.
Examples
- Actinium is a highly radioactive element that is used in medicine for cancer treatment.
- The actinium series is a radioactive decay series that starts with the element actinium and ends with the stable element lead.
- Actinium is a rare earth element that is found in small amounts in uranium ores.
- The discovery of actinium in 1902 by Friedrich Oskar Giesel marked the beginning of a new era in nuclear physics.
- Actinium has 31 known isotopes, all of which are radioactive and have relatively short half-lives.