Liquid the distances between the molecules become smaller. When the liquid reaches its freezing point the molecules will usually lock into a very specific order, called crystallizing, and the bonds between them become more rigid, changing the liquid into its solid state (unless supercooling occurs). Only two elements are liquid at standard conditions for temperature and pressure: mercury and bromine. Four more elements have melting points slightly above room temperature: francium, caesium, gallium and rubidium. Metal alloys that are liquid at room temperature include NaK, a sodium-potassium metal alloy, galinstan, a fusible alloy liquid, and some amalgams (alloys involving mercury). Pure
Chlorine perchlorate 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 anhydrous