Here's why:
* Metals are generally shiny, malleable, ductile, and good conductors of heat and electricity. Uranium fits this description.
* Non-metals are typically dull, brittle, poor conductors of heat and electricity. This is not the case for uranium.
Therefore, uranium is classified as a metal, specifically a transition metal.
It's important to note that while uranium is a metal, it has some properties that are unusual for metals:
* Radioactive: Uranium is a radioactive element, meaning its atoms are unstable and emit particles and energy.
* Density: Uranium is very dense, about 70% denser than lead.
Let me know if you have any other questions!