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Identify all biological elements + purpose + Abundant or Trace? Watch

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    My biology hw is so haaaaaard, it says identify all biological elements in biology and state their purpose as well as if they are needed a lot or are trace? So far I have only found Carbon, Oxygen, Hydrogen, Nitrogen, Sulfur, Phosphor and Iodine? Can someone help please
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    Magnesium in chlorophyll


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    Carbon(18%) in carbohydrates and proteins
    Hydrogen(10%), oxygen(65%) in carbohydrates, proteins and water
    Nitrogen(3%) in proteins
    Calcium (2%) constituent of bones, teeth and needed for blood clotting
    Phosphorus(1%) forms part of ATP and some lipids
    Potassium(0.35%) needed for nerve impulses as it maintains electrical gradients
    Sulphur(0.25%) constituent of some amino acids


    There are more functions but these are the main ones


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