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
Shades of green a shade of greyish green in the classic range of colours of the German RAL colour standard, where it is colour 6011. The name derives from the colour of the leaves of "Reseda odorata", commonly known as mignonette. "Sap green" is a green pigment that was traditionally made of ripe buckthorn berries. However, modern colors marketed under this name are usually a blend of other pigments, commonly with a basis of Phthalocyanine Green G. Sap green paint was frequently used on Bob Ross' TV show, "The Joy of Painting". "Shamrock green" is a tone of green that represents the color