Check all the characteristics below that describe elements.
Check all the characteristics below that describe compounds.
List the six fundamental elements found in living organisms in the text area below.
carbon (C), hydrogen (H), oxygen (O), nitrogen (N), phosphorus (P), sulfur (S)
Check the elements you included in your list.
In the box provided explain why living organisms contain more hydrogen atoms than any other atoms, yet 65% of a typical organism’s mass is oxygen.
Much of an organism’s mass is water. Each water molecule contains two hydrogen atoms and one oxygen atom, so hydrogen atoms are more numerous. But an oxygen atom has about sixteen times the mass of a hydrogen atom, so oxygen makes up a greater share of the organism’s mass.
Check your answers by clicking all of the items you included in your explanation.
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