Transition metal prevent d–d bonding, which again tends to differentiate them from the accepted transition metals. Mercury has a melting point of and is a liquid at room temperature. Transition metal In chemistry, the term transition metal (or transition element) has three possible meanings: English chemist Charles Bury (1890–1968) first used the word "transition" in this context in 1921, when he referred to a "transition series of elements" during the change of an inner layer of electrons (for example n=3 in the 4th row of the periodic table) from a stable group of 8 to one of 18, or from 18 to
Chlorine perchlorate perchlorates: Chlorine perchlorate Chlorine perchlorate is the chemical compound with the formula ClO. This chlorine oxide is an asymmetric oxide, with one chlorine atom in oxidation state +1 and the other +7, with proper formula ClOClO. It is produced by the photolysis of chlorine dioxide at room temperature with 436 nm ultraviolet light: Chlorine perchlorate can also be made the following reactions at −45 °C. Chlorine perchlorate is a pale greenish liquid which decomposes at room temperature. It is less stable than ClO and decomposes to O, Cl and ClO at room temperature. Chlorine perchlorate reacts with metal chlorides forming