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
Shade (comics) that has lasted more than one hundred and fifty years. Another notable point during the series' run came when the Godwave struck the DC universe, depowering almost all superheroes. In a confrontation between Starman, Matt O'Dare, Green Lantern, and The Infernal Doctor Pip, in which Pip almost blows up a large section of an Opal skyscraper, Shade appears at the last minute and draws Pip into the Darklands, which serve as his power source, before the bomb can explode. At various times, Culp is able to take control over or subtly influence Shade. At one point, Culp takes full control