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there is only one atom of each element
Oxidation numbers are very important in much of chemistry because many times atoms do lose or gain electrons. When this happens, they become ions.However, oxidation numbers are especially important when writing chemical formulas for ionic compounds.
Formulas for compounds
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The number of initial chemical compounds (reactants) and the number of final compounds resulted from the reaction (products).
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These numbers are called coefficients (number of atoms and molecules)
It shows numbers and types of atoms that form the compound.
chemical formula