7 - Nitrogen - Colorless nitrogen gas makes up of the atmosphere, but here we see it in liquid form at It is boiling off, creating a visible vapor--not of steam, but of water condensed from the surrounding air.
57 Lanthanum -La- Mixed with other rare earths such as Cerium, lanthanum is used in flints for lighters. Lanthanum compounds are used in electron microscopy to resolve individual atoms and in movie lighting to illuminate vast areas.
22 Titanium Ti- This titanium blisk (bladed impeller disk) is from the intake stage of a jet engine, where the light weight and high strength of titanium are key. Titanium is expensive because it must be cast under inert atmosphere.
Fluorite (also called fluorspar) is a halide mineral composed of calcium fluoride. The word fluorite is derived from the Latin root fluo, meaning a stream or flow of water, because the mineral has been traditionally been used as a flux.
Sodium is a chemical element with the symbol Na (from Latin: natrium) and atomic number It is a soft, silvery-white, highly reactive metal and is a member of the alkali metals; its only stable isotope is