A compound is a substance made of elements in fixed ratios expressed in chemical formulas with subscripts, illustrating the number of atoms of each element. Examples of compounds with subscripts include carbon dioxide, magnesium oxide, and sodium nitrate.
A compound is a substance made up of two or more different elements that are joined together in a fixed ratio. The chemical formula of a compound describes the elements present and the ratio of atoms of each element in the compound using subscripts.
For example, in the compound water (H2O), the subscript 2 indicates that there are two hydrogen atoms bonded to one oxygen atom.
Examples of compounds with subscripts include carbon dioxide (CO2), magnesium oxide (MgO), calcium phosphate (Ca3(PO4)2), dinitrogen tetroxide (N2O4), and sodium nitrate (NaNO3).
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