Thorium is a chemical element; it has symbol Th and atomic number 90. Thorium is a weakly radioactive light silver metal which tarnishes olive grey when it is exposed to air, forming …

Nov 11, 2025 · thorium (Th), radioactive chemical element of the actinoid series of the periodic table, atomic number 90; it is a useful nuclear reactor fuel. Thorium was discovered (1828) by …

Element Thorium (Th), Group 20, Atomic Number 90, f-block, Mass 232.038. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Jun 4, 2024 · Thorium is a silvery-white, slightly radioactive metal with the symbol Th and atomic number 90. It is an element the actinide series and f-block of the periodic table. Thorium takes …

Explore an in-depth guide on Thorium, a radioactive element with promising applications in nuclear energy. Learn about its properties, industrial uses, medical applications, and safety …

Discovered in 1829, thorium is a naturally occurring radioactive metal with no stable isotopes. It is about as abundant as lead. Soil commonly contains an average of about six parts of thorium …

Aug 7, 2025 · Thorium is a little-known element with a rich scientific history and its growing relevance today. Named after the Norse god of thunder, it has played a role in everything from …

Thorium is a chemical element; it has symbol Th and atomic number 90. Thorium is a weakly radioactive light silver metal which tarnishes olive grey when it is exposed to air, forming …

Thorium was discovered by Jöns Jacob Berzelius in 1828, in Stockholm, Sweden after he received a sample of an unusual black mineral from Hans Esmark found on an island close to …

Much of the internal heat the earth has been attributed to thorium and uranium. When pure, thorium is a silvery white metal which is air-stable and retains its lustre for several months.