Chemical Formulas A compound is represented by giving its chemical formula, a notation that uses atomic symbols with numerical subscripts to convey the.

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Presentation transcript:

Chemical Formulas A compound is represented by giving its chemical formula, a notation that uses atomic symbols with numerical subscripts to convey the relative proportion of atoms of different elements in the substance.

Ratio of atoms in compound Molecula formula Empirical Ratio of atoms in compound Carbon dioxide CO2 1 carbon atom : two oxygen atoms formaldehyde CH2O 1 carbon atom : two hydrogen atoms : 1 oxygen atom Acetic acid C2H4O2 1 carbon atom : two hydrogen atoms : 1 oxygen atom Empirical and molecular formulas tell us the combining ratio of the atoms in the compound, but show nothing about how the atoms are attached to each other. There are other types of formula that will show the connectivity of atoms in a molecule.