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| any of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals |
| a double sulfate analogous to potassium alum, as aluminum ammonium sulfate, with the formula R2SO4?X2(SO4)3?24H2O, where R is alkali metal or ammonium |
reagent re·a·gent (rē-ā'jənt)
n.
A substance used in a chemical reaction to detect, measure, examine, or produce other substances.
| reagent (rē-ā'jənt) Pronunciation Key
A substance participating in a chemical reaction, especially one used to detect, measure, or produce another substance. Compare agent. |