#Astatine periodic table atomic number download#

'It's Elemental: Astatine.' Jefferson Lab. Astatine is the least chemically reactive of the halogens and exhibits the most metallic properties of the halogen group. The CRC Handbook of Chemistry and Physics, 84th edition. Because of its similarities to iodine, which accumulates in the thyroid, it is believed that the element could be utilized to treat certain thyroid diseases. The various claims for its discovery reveal many of the nationalistic traits that. Researchers are investigating astatine as a means of treating various cancers (e.g., lethal brain tumors) and diseases. The story surrounding element 85 is one of the most complex and interesting among our seven elements (fig. Additional compounds (HAt and CH 3At) have also been detected.īecause of its scarcity and short half-life, there were no commercial uses for astatine as of 2003. The atomic number of each element increases by one, reading from left to right. Period A horizontal row in the periodic table. Astatine is known to form interhalogen compounds with bromine (AtBr), chlorine (AtCl), and iodine (AtI). Members of a group typically have similar properties and electron configurations in their outer shell. Other isotopes have mass numbers ranging from 193 to 223 and half-lives ranging from 125 nanoseconds ( 213At) to 7.2 hours ( 211At). Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Element Radon (Rn), Group 18, Atomic Number 86, p-block, Mass 222.

#Astatine periodic table atomic number download#

The most stable isotope of astatine is 210At, which has a half-life of 8.1 hours. Download our free Periodic Table app for mobile phones and tablets. Astatine occurs naturally in tiny amounts. Astatine can also be produced in a nuclear reactor by the method used by its discoverers, according to the following reaction: A highly unstable radioactive element, the heaviest of the halogen series, that resembles Iodine in solution. It is produced naturally when the elements uranium and thorium decay. Number of Neutrons: 125 Classification: Halogen Crystal Structure: Unknown Density 293 K: Unknown Color: Unknown. 85 At (Astatine) Appearance: Unknown, (Probably metallic) Mass number: 210 Atomic weight: 209.9871 g/mol Atomic number (Z): 85 Electrons: 85 Protons: 85. The origin of the name 'astatine' is the Greek word astatos, which means 'unstable.'Īstatine is found in only vanishingly small amounts in nature -it is believed that only 30 grams (1 ounce) of the element are present in Earth's crust at any one time. MacKenzie, and Emilio Segr è of the University of California produced the element in 1940 by bombarding an isotope of bismuth ( 209Bi) with alpha particles.

Up to date, curated data provided by Mathematica's ElementData function from Wolfram Research, Inc.Melting point: 302 ☌ boiling point: 337 ☌ density: unknown most common ions: At −, AtO −, AtO 3 −Īstatine is a radioactive halogen (the heaviest of the halogen elements) and is a solid at room temperature. Due to its lower vapour pressure, astatine sublimes less easily. Most of its isotopes have half-lives of one second or less and are extremely unstable. Its atomic mass is 210 grams per mole atomic mass. As with the other halogens, fluorine occurs as a diatomic molecule, F 2, in its elemental form. It has an atomic number of 9 and a density of 1.5127 g cm3 at 188.13 ☌. This group includes chloride, bromine, iodine, and astatine. The periodic table’s atomic number for astatine is 85. Fluorine is the lightest element of Group 17 of the periodic table called halogens. It has no stable isotopes and was first synthetically produced (1940) at the University of California. Iodine (I) Atomic number 53 Astatine (At) Atomic number 85 Tennessine (Ts) Atomic number 117 Here are chlorine, bromine, and iodine (left to right) at room temperature. They are found on the righthand side of the periodic table.

Technical data for AstatineClick any property name to see plots of that property for all the elements.ġ93At, 194At, 195At, 196At, 197At, 198At, 199At, 200At, 201At, 202At, 203At, 204At, 205At, 206At, 207At, 208At, 209At, 210At, 211At, 212At, 213At, 214At, 215At, 216At, 217At, 218At, 219At, 220At, 221At, 222At, 223AtĪtomic Mass: Atomic mass number given for longest lived isotope. Astatine is a radioactive and extremely rare element. Astatine was formerly known as alabamine. The halogens are a periodic table group of elements. Technical data for the element Astatine in the Periodic Table H