Four elements make up about 96% of the mass of the human body. which are those four elements? (choose all that apply.) four elements

The four known elements that make up 96 percent of the mass of the human body are the following: Oxygen or O in the Periodic table, Carbon or C, Hydrogen or H, and Nitrogen or N in the periodic table. These are the 4 elements that makes up the body mass of an individual.

i have no clue hope you find the answer

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72