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
A Shade of Difference in southern states. "Advise and Consent" and its sequels had been out of print for almost 15 years until WordFire Press reissued them in paperback and e-book format in 2014. 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