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Subscript letters saying whether a substance is solid, liquid, gas or dissolved.
Also known as: State symbols, Aqueous label
Small subscript letters after a formula give the physical state: s for solid, l for liquid, g for gas and aq for dissolved in water. The aqueous label is not a fourth state of matter, which is what the letter grouping quietly implies.
State the physical form of each species in an equation using subscript letters after the formula.
Contexts: Laboratory
Include aq for a species dissolved in water, which is a description of a solution rather than a state of matter alongside the other three.
Contexts: Laboratory
One or two small italic letters set in brackets below the line immediately after a chemical formula.