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
Anauroch: The Empire of Shade Anauroch: The Empire of Shade Anauroch: The Empire of Shade is an adventure module for the 3.5 edition of the "Dungeons & Dragons" fantasy role-playing game. "Anauroch: The Empire of Shade" takes place in the Forgotten Realms setting, where malign forces conspire to undo the Weave and replace it with the Shadow Weave, causing the Great Desert of Anauroch to change. The player characters must intervene or else all of Faerun will soon feel the dark might of the greatest magical empire since Netheril. "Anauroch: The Empire of Shade" was published in November 2007, and was written by Greg A.