abundance

/ə'bʌndəns/
Noun
  1. (chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million
  2. (physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present
  3. the property of a more than adequate quantity or supply
    • an age of abundance

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abundance
The pie chart shows the abundance of oxygen in the Earth's crust.