Uranium is radioactive. Exposure to radioactivity can be hazardous to your health. The chemical symbol for uranium is U. Uranium was discovered in 1789 and named after the planet Uranus, which was discovered in 1781. The atomic number for uranium for 92. It is the heaviest element on earth.
Heavier elements do exist, but they are all man-made.
Generally speaking, the higher the atomic number, the heavier the element is. Several methods have been tried to dispose of radioactive uranium safely. Burning is a chemical reaction. It does not stop the uranium from decaying radioactively. Radioactive uranium can be recycled, but this is time-consuming and expensive.