How do scientists use radioactive dating
They extracted the radium compound from uraninite and published the discovery at the French Academy of Sciences five days later.
Radium was isolated in its metallic state by Marie Curie and André-Louis Debierne through the electrolysis of radium chloride in 1911.
Some of radium-226's decay products received historical names including "radium", ranging from radium A to radium G, with the letter indicating approximately how far they were down the chain from their parent Ra is the most stable isotope of radium and is the last isotope in the (4n 2) decay chain of uranium-238 with a half-life of over a millennium: it makes up almost all of natural radium.Radium is the heaviest known alkaline earth metal and is the only radioactive member of its group.Its physical and chemical properties most closely resemble its lighter congener barium.The uranium had been extracted by dissolution in sulfuric acid leaving radium sulfate, which is similar to barium sulfate but even less soluble in the residues.The residues also contained rather substantial amounts of barium sulfate which thus acted as a carrier for the radium sulfate.
The ionizing radiation emitted by radium bromide excites nitrogen molecules in the air, making it glow.