Radium forms many insoluble salts, including sulfate, chromate, carbonate, iodate, and nitrate. Radium nitrate: White compound that can be made by dissolving radium carbonate in nitric oxide.Radium bromide: Colorless luminous compound that is soluble in water.Radium chloride: Colorless luminous compound, it becomes yellow after some time due to self-damage by the alpha radiation.Radium hydroxide: Readily soluble among alkaline hydroxide.It is used in various physics experiments.As additive in products like toothpaste, hair creams,.Radium is used as additive in products like toothpaste, hair creams and even food items.Radium isotopes are used for cancer treatment.Radium and beryllium were once used as a portable source of neutrons. ![]() Most radium compounds are simple ionic compound. Radium and its salts show luminescence and impart a carmine color to flame. Being radioactive it emits alpha and beta particles as well as gamma rays when mixed with beryllium it produces neutron. The sulfate, RaSO 4, is the most insoluble sulfate known, and the hydroxide, Ra (OH) 2, is the most soluble of the alkaline-earth hydroxides. It occurs exclusively as the Ra 2+ ion in all its compounds. It is interacted by water with vigorous evolution of hydrogen and by air with the formation of the nitride. Its compounds display a faint bluish glow in the dark, due to its radioactivity and the electrons release their energy as light when they are de-excited. It forms the colorless Ra 2+ cation in aqueous solution, which is highly basic and does not form complexes readily. Although is the heaviest member of the alkaline-earth group it is the most volatile. Radium is luminescent, corrodes in water to form radium hydroxide. Radium readily oxidizes on exposure to air, and is turned from almost pure white to black. Radium has density 5.5g/cm 3 higher than barium. It is 6 th element in group 2 of periodic table. Melting point 700 C and boiling point 1140 C. Its atomic symbol Ra, atomic number 88, atomic weight 226, solid at room temperature. Radium is silvery, lustrous, soft and radioactive element. Radium is a radioactive element of the alkaline earth series of metals. It was derived from Latin word radius which means rays. Radium originally found in pitchblende ore. This makes it the 84 thmost abundant element. Radium has an abundance in the Earth’s crust by weight about 1 part per trillion. Due to the high solubility of its compounds in water, radium is extracted by successive lixiviation of the referred ores. ![]() In nature, radium is found in uranium and thorium ores in trace amounts as small as a seventh of a gram per ton of uraninite. ![]() Today, radium can be obtained as a byproduct of refining uranium and is usually sold as radium chloride (RaCl 2) or radium bromide (RaBr 2) and not as a pure material. They isolated pure radium in 1911, via electrolysis of radium chloride. Radium was discovered in 1898 by Marie and Pierre Curie (a Polish and French chemist, respectively). It is a lustrous metal and is widely used in various industry. Radium is an alkaline earth metal and was discovered in 1898 by Marie and Pierre Curie.
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