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
Ella (name) Ella (name) In Greek mythology, Ella (Greek: Ἕλλα) was the daughter of Athamas and Nephele. The name may be a cognate with Hellas (Greek: Ἑλλάς), the Greek name for Greece, which said to have been originally the name of the region round Dodona. Another source indicates the name is a Norman version of the Germanic short name "Alia", which was short for a variety of German names with the element "ali"-, meaning "other." It is also a common short name for names starting with "El"-, such as Eleanor, Elizabeth, Elle, Ellen, Ellie, or Eloise. The Hebrew word Ella (אלה) has