Answer
The 12 most abundant chemical elements in the human body are as follows:
Oxygen ; Chemical symbol , O
Carbon ; Chemical symbol, C
Hydrogen: Chemical symbol, H
Nitrogen : Chemical Symbol, N
Calcium : Chemical symbol ;Ca
Phosphorus; Chemical symbol P
Sulfur ; Chemical symbol ; S
Sodium ; Chemical symbol, Na
Chlorine ; Chemical symbol, Cl
Magnesium ; Chemical symbol Mg
Iron ; Chemical symbol, Fe
Work Step by Step
Relative abundance of some elements in the human body:
Percentage by weight
Oxygen , 65%; Carbon, 18%; Hydrogen, 10%; Nitrogen, 3%; Calcium,1.5%; Phosphorus, 1.0%; Sulfur, 0.25%; Potassium. 0.02%; Sodium, 0.15%; Chlorine, 0.15%; Magnesium, 0.05%; Iron, 0.005%.
