Radium exists in very low concentrations in uranium ores; uranium may occur also in very low concentrations in granitic rocks (10-20 ppm).
Radium exist in very low concentrations in uranium and thorium ores; it is very difficult and expensive to extract radium from these ores.
She discovered the element Radium
Radium exist in very small concentrations in uranium ores but not in a metallic, pure form.
Radium is a chemical element, not a compound.
Radium is not a common commercial product.
that is what im trying to find!
in ore of pitchblende
Radium exist in very low concentrations in uranium and thorium ores; it is very difficult and expensive to extract radium from these ores.
She discovered the element Radium
Radium exist in very small concentrations in uranium ores but not in a metallic, pure form.
that it causes cancer
She invented polonium.
radium
Radium is a chemical element, not a compound.
Radium is not a common commercial product.
Radium chloride, RaCl2, was the first radium compound to be prepared in a pure state and was the basis of Marie Curie's original separation of radium from barium. The first preparation of radium metal was by the electrolysis of a solution of radium chloride using a mercury cathode.
The first name was radium; some isotopes had in the past other names.