The most common element by mass percent in the human body is
A)carbon.
B)hydrogen.
C)oxygen
D)sulfur.
E)phosphorus.

Question

Quizplus · Accepted Answer

Oxygen makes up approximately 65% of the mass of the human body, making it the most common element by mass percentage. Carbon is the fourth most abundant element, making up only 18% of the body, while hydrogen and phosphorus are even less abundant. Sulfur is present in trace amounts, much less than the other elements mentioned.

The Most Common Element by Mass Percent in the Human