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Even so, half of a given quantity of astatine will vaporize in approximately an hour if put on a clean glass surface at room temperature. [ a ] The absorption spectrum of astatine in the middle ultraviolet region has lines at 224.401 and 216.225 nm, suggestive of 6p to 7s transitions .
Astatine: Radon: Francium: Radium ... (MnSb is paramagnetic at elevated temperatures and ferromagnetic at room temperature); ... The "true" +5 state is more common ...
Sodium astatide solution has been prepared by distilling astatine from the bismuth alpha-ray target where it was prepared, dissolving in sodium bicarbonate solution, and reducing At + and At 3+ ions with ascorbic acid.
Astatine-212 and astatine-216 are expected to decay either way. The most stable isotope of astatine is astatine-210, which has a half-life of about 8.1 hours. This isotope's primary decay mode is positron emission to the relatively long-lived alpha emitter, polonium-210. In total, only five isotopes of astatine have half-lives exceeding one ...
Astatine monochloride [7] (AtCl) ... Bromine trifluoride has a boiling point of 127 °C and is a liquid at room temperature. Iodine trichloride melts at 101 °C. [1]
"Estimation Chemical Form Boiling Point Elementary Astatine by Radio Gas Chromatography". Radiochimica Acta. 31 (3 ...
Astatine: Radon: Francium: Radium: Actinium: ... Solid state form ... Water is the only other known hydrogen chalcogenide which is a liquid at room temperature ...
The hydrogen halides are diatomic molecules with no tendency to ionize in the gas phase (although liquified hydrogen fluoride is a polar solvent somewhat similar to water). Thus, chemists distinguish hydrogen chloride from hydrochloric acid. The former is a gas at room temperature that reacts with water to give the acid.