Astatine - Wikipedia
WEBAstatine is a chemical element; it has symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust , occurring only as the decay product of various heavier elements.
Astatine - Element information, properties and uses | Periodic …
WEBElement Astatine (At), Group 17, Atomic Number 85, p-block, Mass [210]. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
Astatine | Radioactive Halogen, Uses in Medicine & Research
WEBAstatine (At), radioactive chemical element and the heaviest member of the halogen elements, or Group 17 (VIIa) of the periodic table. Astatine, which has no stable isotopes, was first synthetically produced (1940) at the University of California by American physicists Dale R. Corson, Kenneth R.
Astatine Element | Uses, Facts, Physical & Chemical Characteristics
WEBAstatine is the least reactive element among its group, halogens. Chemically, astatine shows metallic properties and forms stable monatomic cations in the presence of water. various compounds of astatine are like compounds of iodine.
Facts About Astatine - Live Science
WEBMay 24, 2017 · Astatine is the rarest element on Earth; only approximately 25 grams occur naturally on the planet at any given time. Its existence was predicted in the 1800s, but was finally discovered...
Astatine Facts (Element 85 or At) - ThoughtCo
WEBJan 2, 2020 · Astatine is a radioactive element with symbol At and atomic number 85. It has the distinction of being the rarest natural element found in the Earth's crust, as it is only produced from radioactive decay of even heavier elements. The element is similar to its lighter congener, iodine.
Astatine | At (Element) - PubChem
WEBAstatine is a chemical element with symbol At and atomic number 85. Classified as a halogen, Astatine is a solid at room temperature.
Astatine, Chemical Element - uses, elements, metal, number, …
WEBAstatine is a member of the halogen family, elements in Group 17 (VIIA) of the periodic table. It is one of the rarest elements in the universe. Scientists believe that no more than 25 grams exist on the Earth's surface. All isotopes of …
Properties of astatine | Britannica
WEBastatine, Radioactive chemical element and the heaviest halogen element, chemical symbol At, atomic number 85. It was first synthetically produced in 1940 from the bombardment of bismuth by alpha particles and neutrons.
Astatine (At) - Periodic Table
WEBAstatine is the 85th element in the periodic table and has a symbol of At and atomic number of 85. It has an atomic weight of (210) and a mass number of 191. Astatine has eighty-five protons and one hundred six neutrons …