Uranium
the main element extracted was radium
Polonium is a radioactive element discovered by Pierre and Marie Curie by boiling Pitchblende with water and chemicals.
Protactinium is a natrural chemical element, radioactive, unstable; protactinium is found in extremely low concentrations, in pitchblende - an uranium ore.
Pitchblende is a name for uraninite, a radioactive mineral from which uranium ore is extracted. The composition of pitchblende can include uranium oxide (UO2) and triuranium octoxide (U3O8), along with lead oxide and pockets of helium.Pitchblende is a radioactive, uranium-rich mineral and ore. It has a chemical composition that is largely UO2, but also contains UO3 and oxides of lead, thorium, and rare earth elements. It is known as pitchblende due to its black color and high density. It is also commonly referred to as Uraninite.
Radium was discovered by Marie Sklodowska Curie, a Polish chemist, and Pierre Curie, a French chemist, in 1898. Marie Curie obtained radium from pitchblende, a material that contains uranium, after noticing that unrefined pitchblende was more radioactive than the uranium that was separated from it. She reasoned that pitchblende must contain at least one other radioactive element. Curie needed to refine several tons of pitchblende in order to obtain tiny amounts of radium and polonium, another radioactive element discovered by Curie. One ton of uranium ore contains only about 0.14 grams of radium. Today, radium can be obtained as a byproduct of refining uranium and is usually sold as radium chloride (RaCl2) or radium bromide (RaBr2) and not as a pure material.
pitchblende was the first, but any good uranium ore will do as it is a daughter element of uranium's decay.
The Curies noted that pitchblende, one of many compounds of uranium, had significantly higher amounts of radioactivity than other compounds. From that, they concluded that pithcblende contained an element more radioactive than uranium. They chemically removed those parts of pitchblende with less radioactivity, and ended up with a microscopic amount of radium -- after processing literally tons of pitchblende.
As radioactive element is an element that is on the Priodic Table of Elements. A Radioactive Element is usually radioactive.
This element is actinium (Ac).
non radioactive element
Marie and Pierre Curie isolate radium. On April 20, 1902, Marie and Pierre Curie successfully isolate radioactive radium salts from the mineral pitchblende in their laboratory in Paris. In 1898, the Curies discovered the existence of the elements radium and polonium in their research of pitchblende.
Radium is an element itself. It was isolated by Marie Curie from Pitchblende, an ore of Uranium.