Titanium was first discovered as its oxygen compound in 1791 by William Gregor and named in 1795 by Martin H. Klaproth after the titans of Greek mythology. The pure metal, obtained in 1910, remained a curiosity until an economical pureification process was discovered in 1946. Rock samples from the moon indicate titanium is far more abundant there. Titanium compounds have a variety of uses. It is used extensively in paint, replacing the poisonous lead white.
Titania has a light yellow color and a higher index of refraction than diamond but is rather soft.
Because living tissue is biocompatible with titanium alloys, they are also used in surgical implantations. The chemical element nitrogen is a colorless and odorless gas. Nitrogen s chemical symbol is N, atomic weight is 14.0067 and atomic number is 7. Nitrogen is the most abundant unconbined element. One of the few elements found unconbined in nature.