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 Shade of Difference A Shade of Difference A Shade of Difference () is a 1962 political novel written by Allen Drury. It is the first sequel to "Advise and Consent", for which Drury was awarded the Pulitzer Prize for Fiction in 1960, and was followed in 1966 by "Capable of Honor". The novel focuses on the politics among delegations to the United Nations and the troubles that Third World nations cause the United States as it vies for political advantages against the Soviet Union during the Cold War, as well as racial tensions within the United States surrounding the integration of public schools