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Astatine is a very rare radioactive chemical element with the chemical symbol At and atomic number 85. It occurs on Earth as the decay product of various heavier. Element Astatine (At), Group 17, Atomic Number 85, p-block, Mass . Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Astatine.s properties, interesting facts, discovery, videos, images, states, energies, appearance and characteristics. Astatine 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. Astatine is the rarest element on earth. It is only available in tiny quantities. Its properties are inferred from its position in the periodic table and by studying. Astatine (At) has an atomic number of eighty-five. This unstable hallogen wasn.t discovered until 1940 and was once believed to be the rarest element on Earth.

Astatine, Chemical Element - uses, elements, metal, number, name

Astatine (At), astatine radioactive chemical element and the heaviest member of the halogen elements, or Group 17 (VIIa) of the periodic table. Astatine (At) has 37 known isotopes, all of which are radioactive. the range of their mass numbers is from 191 to 229. There also exist 23 metastable excited states. This WebElements periodic table page contains uses for the element astatine.

Astatine - Element information, properties and uses Periodic Table.

About Astatine. With less than one gram present on earth at any given time, radioactive Astatine is the second rarest naturally-occurring element on the periodic. Astatine. Astatine is a highly radioactive element and it is the heaviest known halogen. Its chemical properties are believed to be similar to those of iodine. The element astatine has no uses currently, apart from basic scientific research. Astatine is very scarce in Earth.s crust, and its various isotopes have short half. This WebElements periodic table page contains the essentials for the element astatine. Noun 1. a radioactive element of the halogen series: a decay product of uranium and thorium that occurs naturally in minute amounts and is artificially produced by. Properties of astatine. Astatine is the rarest element on Earth. It is a highly radioactive halogen. Chemically, it behaves similarly to other halogens.

Origin of Name: From the Greek word astatos, meaning unstable: Date and Place of Discovery: At the University of California in 1940: Discovered by: Dale R. Corson, K. Facts Date of Discovery: 1940 Discoverer: D.R. Corson Name Origin: From the Greek word astatos (unstable) Uses: No uses known Obtained From: Man-made. Discover more about Astatine. One of thousands of articles selected and checked for the for Schools by SOS Children.s Villages UK.

Astatine Define Astatine at.

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