* Uranium, Boron, and Salt are all elements or compounds with metallic properties.

* Uranium is a heavy radioactive metal.

* Boron is a metalloid, meaning it shares properties of both metals and nonmetals.

* Salt (typically sodium chloride) is a compound formed from a metal (sodium) and a nonmetal (chlorine).

* Hydrogen, however, is a nonmetal. It's a gas at room temperature and is a key component of many organic compounds, but it doesn't share the metallic characteristics of the other items listed.