Which of the following elements is found in maximum percentage in the human body?
(1) Carbon
(2) Hydrogen
(3) Nitrogen
(4) Oxygen
Answer: (4) Most of the human body is made up of water, H2O, with cells consisting of 65-90% water by weight. Therefore, it isn’t surprising that most of the human body’s mass is oxygen. Carbon, the basic unit for organic molecules, comes in second. 99% of the mass of the human body is made up of just six elements: oxygen, carbon, hydrogen, Nitrogen, Calcium, and phosphorus.
