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Introduction to Biomolecules

In human body...

Question

In human body which element is most abundant by weight and by number respectively?

a) carbon, hydrogen

b) oxygen, hydrogen

c) oxygen, carbon

d) carbon, nitrogen

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Solution

The most abundant element by weight is oxygen. Our body is composed of 55–60% water hence it is natural that hydrogen and oxygen are the two most abundant elements by weight .

Hydrogen is the most abundant element by number.

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