Uranium, symbol U, atomic number 92. Periodic table of elements. Radioactive elements are uranium, radium, polonium, and thorium. Dangerous radiation. Toxic substances. Atomic mass and weight. Poster #801200228
Uranium, symbol U, atomic number 92. Periodic table of elements. Radioactive elements are uranium, radium, polonium, and thorium. Dangerous radiation. Toxic substances. Atomic mass and weight. Poster #801200228
