[{"from": "human", "value": "Could you provide a description of this molecule? [235U]"}, {"from": "gpt", "value": "The molecule is an isotope of uranium. Uranium is a chemical element that has the symbol U and atomic number 92. It is a normal part of rocks, soil, air, and water, and occurs in nature in the form of minerals. Natural uranium is a mixture of three radioactive isotopes called uranium-234, uranium-235, and uranium-238. Uranium-235 is used as a fuel for nuclear reactors and nuclear weapons. Uranium is also used as a colorant in uranium glass, producing orange-red to lemon yellow hues. (L248, L249)"}]