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, the Changing Man Shade, the Changing Man Shade, the Changing Man is a fictional comic book character created by Steve Ditko for DC Comics in 1977. The character was later adapted by Peter Milligan and Chris Bachalo in one of the first Vertigo titles. Both versions of Shade are distinct from the Shade, another DC Comics character. "Shade, the Changing Man" told the story of a fugitive from the militant planet Meta in another dimension. Shade (whose full name is Rac Shade) was powered by a stolen "M-vest" (or Miraco-Vest, named for its inventor) which protected him with a force field and enabled