Which element is most abundant in the earth crust?


The most abundant element in the earth’s crust is oxygen (46. 1%). The chemical formula of oxygen (dioxygen) is O2. This formula is given so because oxygen usually combines with another oxygen by forming a covalent bond.

Composition of the atmosphere – Oxygen

  • The atmosphere is composed of 21% oxygen.
  • It is used by all living things and is essential for respiration.
  • It is obligatory for burning.

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