Radium is the heaviest known alkaline earth metal and is the only radioactive member of its group. These applications have become obsolete owing to radium's toxicity as of 2020, less dangerous isotopes (of other elements) are instead used in radioluminescent devices. Formerly, around the 1950s, it was used as a radioactive source for radioluminescent devices and also in radioactive quackery for its supposed curative power. As of 2014, other than its use in nuclear medicine, radium has no commercial applications. Radium is not necessary for living organisms, and its radioactivity and chemical reactivity make adverse health effects likely when it is incorporated into biochemical processes because of its chemical mimicry of calcium. In nature, radium is found in uranium and (to a lesser extent) thorium ores in trace amounts as small as a seventh of a gram per ton of uraninite.

Radium was isolated in its metallic state by Marie Curie and André-Louis Debierne through the electrolysis of radium chloride in 1911. They extracted the radium compound from uraninite and published the discovery at the French Academy of Sciences five days later. Radium, in the form of radium chloride, was discovered by Marie and Pierre Curie in 1898 from ore mined at Jáchymov. When radium decays, it emits ionizing radiation as a by-product, which can excite fluorescent chemicals and cause radioluminescence. All isotopes of radium are radioactive, the most stable isotope being radium-226 with a half-life of 1,600 years. Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) upon exposure to air, forming a black surface layer of radium nitride (Ra 3N 2). It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Actual product may vary.Radium is a chemical element with the symbol Ra and atomic number 88. Step 4: After all selections are made, add item to cart and proceed to checkout. Step 3: The Feed/Return line kit option is a chance to specify what kind of fuel filter element material is needed. Step 2: Select the color of fuel pressure regulator in the next option list. Fuel pump hanger part numbers ending in -00 do not include pumps and are a good choice for those who already have compatible pumps. Step 1: Select a fuel hanger pump configuration based on the vehicle requirements.

The included fuel rail, fittings, and regulator feed the 2JZ-GTE engine and converts to top feed injectors (not included).

The fuel lines include pre-fabricated PTFE hoses, a high flow fuel filter, AN fittings and other required parts to plumb fuel to and from the fuel rail. The in-tank fuel hanger replaces the factory unit and can be configured with a variety of different fuel pump options. The Radium in-tank fuel pump hanger, feed and return lines, fuel rail, and pressure regulator completely replace the restrictive OEM fuel system with a setup capable of supporting well over 1,000hp and safe to use with ethanol fuels. This comprehensive kit includes everything required to construct a high performance fuel delivery system for the MKIV Toyota Supra.

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