Trivial name for example, hydrogen ("water-producing"), oxygen ("acid-producing"), nitrogen ("soda-producing"), bromine ("stink"), and argon ("no reaction") were based on Greek roots, while the names of iodine and chlorine were derived from the Greek words for their characteristic colors. Indium, rubidium, and thallium were similarly named for the colors of particular lines in their emission spectra. Iridium, which forms compounds of many different colors, takes its name from "iris", the Latin for "rainbow". The noble gases have all been named for their origin or properties. Helium comes from the Greek "helios", meaning "sun" because it was first detected as a line in the
Westward the Course of Empire Takes Its Way the 1995 computer game "Oregon Trail II" depict the study version of this painting on the title screen. Westward the Course of Empire Takes Its Way Westward the Course of Empire Takes Its Way (also known as Westward Ho) is a painted mural displayed behind the western staircase of the House of Representatives chamber in the United States Capitol Building. The mural was painted by Emanuel Gottlieb Leutze in 1861 and symbolizes Manifest Destiny, the belief that the United States was destined for Western exploration and expansion originating from the initial colonies along the Atlantic seaboard to the Pacific Ocean.