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
A Pleasant Shade of Gray A Pleasant Shade of Gray A Pleasant Shade of Gray is a concept album by the progressive metal group Fates Warning, released in 1997. It contains one song divided into twelve parts and is noted for its darker mood and more progressive style. "A Pleasant Shade Of Gray" is a single song that is divided into twelve tracks. The album is notable for its darker mood and mixture of progressive rock and metal with hints of industrial, classical, and psychedelia. Jim Matheos wrote the album following Fates Warning's 1994 tour in support of "Inside Out", with Matheos mailing tapes to