The four most common elements, comprising 96% of the body's mass, are:
A. carbon, sodium, phosphorus, sulfur.
B. oxygen, nitrogen, hydrogen, carbon.
C. chlorine, sodium, magnesium, potassium.
D. oxygen, potassium, iron, copper.
Answer:B
The four most common elements, comprising 96% of the body's mass, are:
A. carbon, sodium, phosphorus, sulfur. B. oxygen, nitrogen, hydrogen, carbon. C. chlorine, sodium, magnesium, potassium. D. oxygen, potassium, iron, copper.