Present price of radium is $25 per milligram, $25,000 per gram, $700,000 per ounce. The chemical element radon is classed as a noble gas and a nonmetal.
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In the 1940’s radon is used X-ray sources and for industrial radiography.Changes in groundwater radon concentrations help in the prediction of Earthquake.
Radon is used to track air masses to a limited level.Radon is also used in radiation therapy….Scientific: It is used in the treatment of cell damage and cancer.
RADIUM USES FREE
Radium is a silvery white metal that does not occur free in nature. Radium (Ra), radioactive chemical element, the heaviest of the alkaline-earth metals of Group 2 (IIa) of the periodic table. Earlier, Ra was used as an additive in a product such as toothpaste, hair cream, and even food items. Radium was formerly used in self-luminous paints for watches, nuclear panels, aircraft switches, clocks, and instrument dials. Some of the few practical uses of radium are derived from its radioactive properties. In its elemental form, CAS, radium has a silvery white metallic appearance….Radium Properties. The radium atom has a covalent radius of 221☒ pm and its Van der Waals radius is 283 pm. Less damaging materials, such as radium or certain cesium isotopes used in medical treatments are easier to acquire. The most deadly materials, including weapons-grade plutonium or uranium or freshly spent nuclear fuel, are the most difficult to obtain. Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) on exposure to air, forming a black surface layer of radium nitride (Ra3N2)…. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals.
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It is chemically unreactive, it is highly radioactive and has a short half life. At temperature below it’s freezing point is has a brilliant yellow phosphorescence. Radon is colorless at standard temperature and pressure and it is the most dense gas known.