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.

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the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.