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
Deeper Shade of Soul B. Man on the Corner (3:38) Deeper Shade of Soul "Deeper Shade of Soul" is the debut single by Dutch band Urban Dance Squad. It was taken from their debut album "Mental Floss for the Globe" and samples the Ray Barretto song he recorded in 1968 with a similar name ("A Deeper Shade of Soul"). Originally released in 1990, the single reached number 21 on the "Billboard" Hot 100 in March 1991 and stayed on the charts for 18 weeks. In the United States it is the song for which the band is best known, being their only hit single.