Chemical element whole number. For example, the relative atomic mass of chlorine is 35.453 u, which differs greatly from a whole number as it is an average of about 76% chlorine-35 and 24% chlorine-37. Whenever a relative atomic mass value differs by more than 1% from a whole number, it is due to this averaging effect, as significant amounts of more than one isotope are naturally present in a sample of that element. Chemists and nuclear scientists have different definitions of a "pure element". In chemistry, a pure element means a substance whose atoms all (or in practice almost all) have 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