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 Hazy Shade of Winter A Hazy Shade of Winter "A Hazy Shade of Winter" is a song by American music duo Simon & Garfunkel, released on October 22, 1966, initially as a stand-alone single, but was subsequently included on the duo's fourth studio album, "Bookends" (1968). It peaked at number 13 on the "Billboard" Hot 100. In 1987, for the "Less Than Zero" soundtrack, the Bangles recorded a cover version which peaked at number two on the "Billboard" Hot 100. The duo recorded "A Hazy Shade of Winter" during the sessions for "Parsley, Sage, Rosemary and Thyme" (1966), but the song was not included