Chemical formula - definition of chemical formula by The Free Dictionary. Hence option A is an example of an element. Chemical formula - a representation of a substance using symbols for its constituent elements formula statement - a message that is stated or.
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Every member of the class of paraffin hydrocarbons is for example composed of hydrogen and carbon the number of hydrogen atoms always being two or more than twice the number of carbon atoms. Every member of the class of paraffin hydrocarbons is for example composed of hydrogen and carbon the number of hydrogen atoms always being two or more than twice the number of carbon atoms. Hence option A is an example of an element. A subscript is used only when more than one atom of a given type is present Molecular formulas are also used as abbreviations for the names of compounds.