An intensely radioactive metallic element found (combined) in minute quantities in pitchblende, and various other uranium minerals. Symbol, Ra; atomic weight, 226.4. Radium was discovered by M. and Mme. Curie, of Paris, who in 1902 separated compounds of it by a tedious process from pitchblende. Its compounds color flames carmine and give a characteristic spectrum. It is divalent, resembling barium chemically. The main isotope of radium found in pitchblende, radium-226, has a half-life of 1620 years, decaying first by alpha emission to radon.
A very rare and precious element that gives off radiations that are useful in medicine and the physical sciences. Discovered in 1898 by Pierre and Marie Curie. Julian 5th describes radium as lighting the tunnels that lead to the cities inside the craters of Va-nah. (Note: Light probably the same as the light giving off by the old radium watch dials.) [MMa
A radioactive metallic element used specially in luminous materials. It is a decay product of uranium.
an intensely radioactive metallic element that occurs in minute amounts in uranium ores
A highly radioactive material used in the treatment of malignant diseases
radioactive element that occurs naturally.
A chemical element, Ra, that has an atomic number 88. It is used as a source of neutrons and makes lightning rods more effective.
a naturally occurring radioactive metal. Radium is a radionuclide formed by the decay of uranium (U) and thorium (Th) in the environment. It occurs at low levels in virtually all rock, soil, water, plants, and animals. Radon (Rn) is a decay product of radium.
One of the earliest known radioactive metals. Radiotherapy used to be called 'radium treatment' because all radiotherapy used to be given using radium.
A radioactive element codiscovered by Marie Curie and Deuce, her husband at the time. The resulting squabble over who deserved the lion's share of the credit lead to a messy and costly divorce.
A naturally occurring radioactive element (in the form of radium-226 or radium-228) created in the decay of the uranium and thorium series. Radium can be removed from water by cation exchange softening.
See table. ... : an isotope of polonium produced in uranium decay, namely 218Po (half-life = 3 min). [ Rutherford & Royds] ... There were three isotopes whose designation included radium C, all of which occur in uranium decay. Simple radium C is an isotope of bismuth, namely 214Bi (half-life = 20 min). [Rutherford , , & ] Radium C' is an isotope of polonium, namely 214Po; it is the major decay product of radium C. Radium C2 is an isotope of thallium, namely 210Tl (half-life = 1.3 min); it is a minor decay product of radium C. [ Soddy] ... : radiolead. [Soddy & ] ... : 210Bi, first made synthetically in 1936 by John Jacob Livingood by bombarding natural bismuth (209Bi) with deuterons. ... : radiotellurium. ... : The isotope of lead which is the end-product of uranium/radium decay, namely 206Pb.
One of four primary radionuclides in FUSRAP wastes. They include radium-226, radon-222, thorium-230, uranium-234, uranium-235 and uranium-238.
A radioactive decay product of uranium often found in uranium ore. It has several radioactive isotopes. Radium-226 decays to radon-222.
A radioactive element which the chemical symbol Ra; radium and its salts are used in gamma-ray radiography because of their radioactivity. Radium's melting point is 700°C (1,292°F).
Radium (IPA: ) is a chemical element, which has the symbol Ra and atomic number 88 (see the periodic table). Its appearance is almost pure white, but it readily oxidizes on exposure to air, turning black. Radium is an alkaline earth metal that is found in trace amounts in uranium ores.