Question

Almost 98% of Earth's crust is made up of eight elements. Which of the following does NOT figure among these elements?
1. Oxygen
2. Carbon
3. Silicon
4. Calcium

Answer 1

Correct Answer - Option 2 : Carbon

The correct answer is Carbon.

• The outermost surface of the Earth is called the lithosphere, or crust.
  • This rigid layer contains both the oceans and landmasses.
  • Most elements are found in only trace amounts within the earth’s crust, but several are abundant.
  • About 98% of the total crust is made up of eight elements as oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium.
  • The rest 2% is constituted by elements like titanium, hydrogen, phosphorous, manganese, sulphur, carbon, nickel, and others.
  • The elements in the earth’s crust are rarely found exclusive but are usually combined with other elements to make various substances.
  • Oxygen is by far the most abundant element in earth's crust at 46.6 percent, nearly half of the mass of the crust.