Hint: It’s atomic number of 92.

Uranium, with an atomic number of 92, is the heaviest naturally occurring element on Earth. It is a dense, metallic element that is weakly radioactive and has a silvery-gray appearance. Found in various minerals, the most common being uraninite, uranium is prevalent in small amounts throughout the Earth's crust.

The element's discovery in 1789 by German chemist Martin Heinrich Klaproth marked a milestone in chemistry and nuclear science, eventually leading to its pivotal role in the development of nuclear energy and atomic.