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Every element in the periodic table is represented by a unique chemical symbol, like O for Oxygen or Mg for Magnesium.Chemical formulas represent compounds or elements where more than one atom are ...

At the heart of our biological composition are four elements: oxygen (O), carbon (C), hydrogen (H) and nitrogen (N ... are almost one-quarter of the periodic table and are mainly found in ...

It uses chemical symbols from the periodic table ... The ‘aq’ tells us that magnesium sulfate is dissolved in water. The atmosphere is made up of around 78% nitrogen (N₂) and 21% oxygen ...