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The most important element on the earth’s crust is?

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CHEMISTRY

The most important element on the earth’s crust is?

A. Nitrogen

B. Hydrogen

C. Oxygen

D. Fluorine

QUICK ANSWER…

C

DETAILS…

The phrase “most important” here could actually imply most abundant element within the earth’s crust.

Technically speaking, the most abundant element will be the most important.

Now, oxygen is the most abundant element on the earth’s crust followed closely by silicon. The reason is simple, the earth’s crust is mainly sand, minerals, and rocks. Now the formula for sand is silicon(iv)oxide, or SiO₂.

You can now see why oxygen and silicon are the most abundant elements on the earth’s crust.

Ten most abundant elements on the earth’s crust are listed below in decreasing order.

  • Oxygen = 46.1%
  • Silicon = 28.2%
  • Aluminum = 8.23%
  • Iron = 5.63%
  • Calcium = 4.14%
  • Sodium = 2.35%
  • Magnesium = 2.33%
  • Potassium = 2.09%
  • Titanium = 0.57%
  • Hydrogen = 0.14%

Now for the right answer to the above question:

  1. Option A is incorrect. Nitrogen is almost not present on the earth’s crust
  2. Option B is incorrect. hydrogen is the tenth most important.
  3. C is correct. oxygen is the most important.
  4. D is not the correct answer. fluorine not even among the first ten.

KEY-POINTS…

You may please note these/this:

  • Nitrogen is not present in the earth’s crust but in the atmosphere.
  • The earth’s crust refers to the solid outer surface where we all tread upon.
  • Oxygen is the most abundant or important element in the earth’s crust, followed closely by nitrogen.
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/ culled from 2020 JAMB-UTME chemistry past question 39 /

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