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Medicine LibreTexts

1.02: Elements and Atoms

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  • The elements (simplest chemical substances) found in an animal’s body are all made of basic building blocks or atoms. The most common elements found in cells are given in the table below with the symbol that is used to represent them.

    Element Symbol
    Calcium Ca
    Carbon C
    Chlorine Cl
    Copper Cu
    Iodine I
    Hydrogen H
    Iron Fe
    Magnesium Mg
    Nitrogen N
    Oxygen O
    Phosphorous P
    Potassium K
    Sodium Na
    Sulphur S
    Zinc Zn


    • Ruth Lawson (Otago Polytechnic; Dunedin, New Zealand)