Actinide

Actinides (from ancient Greek ἀκτίνη - beam, thread) - a family of actinides.

Actinides are radioactive elements that are found in D. I. Mendeleev’s periodic table of elements. They are transuranium elements and have serial numbers from 90 to 103.

The first two members of the family, 227Ac and 223Ra, were discovered in 1940. Since then, several more actinides have been discovered, including 229Pa, 231Th and 233U.

The main properties of actinides include high radioactivity, high density and the ability to undergo nuclear reactions. They also have high melting and boiling points, as well as high chemical reactivity.

The best known actinide is uranium, 238U. It is the most abundant actinide on Earth and is used in nuclear reactors and nuclear power.

In general, actinides are an interesting class of radioactive elements that have many applications in various fields of science and technology.