98-99% (dry weight) of all life is made up of 6 elements.
(CHNOPS): Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, and Sulfur.
These are the most abundant elements of life.
Of the 100 plus known elements, two to three dozen can be found in most organisms. Most are found in trace amounts, but five stand out: carbon, hydrogen, oxygen, nitrogen and phosphorus.