U4: Section #1
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Last updated 3:00 AM on 3/13/25
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7 Terms
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Coefficient
A number indicating how many molecules or atoms are present in a chemical formula.
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Subscript
A number written below and to the right of a chemical symbol, indicating the number of atoms of that element in a molecule.
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H₂O
The chemical formula for water, representing two hydrogen atoms and one oxygen atom.
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H₂O₂
The chemical formula for hydrogen peroxide, representing two hydrogen atoms and two oxygen atoms.
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Difference between coefficients and subscripts
Coefficients indicate the number of molecules, while subscripts indicate the number of atoms of each element in a molecule.
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2H₂O
Indicates two molecules of water, each containing two hydrogen atoms and one oxygen atom.
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5H₂O
Indicates five molecules of water.
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