Thorite
thorite
Francium is a radioactive, very rare, natural chemical element.
Astatine is not a mineral but a chemical element. Astatine can be obtained as a pure element but in extremely small quantities.
A mineral is defined as a compound having a fixed chemical composition ... Thus an element is not a mineral.
Osmium is a mineral. It is a chemical element and has the symbol Os.
Promethium is a chemical element, a metal.
No, but it is an element found in many minerals.
Any of a variety of elements might do for this, including thorium and uranium, but even potassium has an important radioactive isotope in it.
Uranosphaerite is a radioactive mineral with the following chemical formula: Bi(UO2)O2(OH).
Chromium is a mineral. It is a chemical element in the periodic table and has the symbol Cr.
A metal is a chemical element, any other mineral.
No, iodine is not a mineral sulfide. Iodine is a chemical element and essential nutrient that is commonly found in seawater and some minerals. Sulfides are a group of minerals that contain sulfur combined with another element or elements, but iodine is not classified as a mineral sulfide.