Copper Element Cube Hazmat forming a black surface layer

forming a black surface layer of radium nitride (Ra3N2)

This set includes a sophisticated light bar display

As a physical remnant of one of the most ambitious aerospace programs in history

Native gray diamonds for the carbon sample

Nitrogen's atomic number is 7 and its symbol is N

Copper Element Cube Hazmat forming a black surface layerCopper's atomic number is 29 and its symbol is Cu. Copper has been used by mankind since well, the copper age. Its high conductivity makes it perfectly suited for electronic wiring. Throughout history, it has been used for currency, artwork, and even jewelry. It is also a key ingredient in alloys such as bronze and brass. On its own, it tarnishes relatively fast into a greenish color. A good example of its oxidization is the Statue of Liberty in the