Only six elements make up 99% of the human body's mass. the six elements are
a. carbon, oxygen, hydrogen, nitrogen, calcium, and sodium.
b. carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus.
c. oxygen, hydrogen, nitrogen, calcium, phosphorus, and sodium.
d. oxygen, hydrogen, nitrogen, calcium, phosphorus, and zinc.

B:

Although there are almost 100 elements in nature, only six of them compose 99% of our body’s mass— carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus.

The correct answer is: The volume of the nucleus is large compared to the rest of the atom. This was an experiment where scientists discovered that every single atom contains a nucleus. In their discovery they found out that the nucleus contains positively charged particles and that most of the mass of the atom is concentrated within the nucleus.