Chemistry
Grade-10
Easy

Question

Which of the following is the correct order?

  1. O > Si > Ca > Al
  2. O > Si > Al > Ca
  3. Si > O > Ca > Na 
  4. Al > Fe > O > K

hintHint:

O>Si>Al>Ca

The correct answer is: O > Si > Al > Ca


    Elements of earth's crust in decreasing order of their percentage is:

    oxygen 46.1%, Silicon 28.2%, Aluminium 8.23%, Calcium 4.2%.

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