| 单词 | polyatomic |
| 例句 | In their lower oxidation states, the transition elements form ionic compounds; in their higher oxidation states, they form covalent compounds or polyatomic ions. Chemistry 2019-02-14T00:00:00Z In common with many other polyatomic open-chain alcohols, they generally possess a characteristic sweet, or mildly sweetish, taste. The Chemistry of Plant Life Some of the more important polyatomic ions are listed in Table 2.5. Chemistry 2019-02-14T00:00:00Z However, the formulas for some ionic compounds containing polyatomic ions are not empirical formulas. Chemistry 2019-02-14T00:00:00Z For example, potassium nitrate, KNO3, contains the K+ cation and the polyatomic anion. Chemistry 2019-02-14T00:00:00Z However, these polyatomic ions form ionic compounds by combining with ions of opposite charge. Chemistry 2019-02-14T00:00:00Z All such monosaccharides, being alcohol-aldehydes, can easily be reduced to the corresponding polyatomic alcohols, containing the same number of carbon atoms as the original monosaccharides, each with one OH group attached to it. The Chemistry of Plant Life Oxyanions are polyatomic ions that contain one or more oxygen atoms. Chemistry 2019-02-14T00:00:00Z At this point in your study of chemistry, you should memorize the names, formulas, and charges of the most common polyatomic ions. Chemistry 2019-02-14T00:00:00Z Note that there is a system for naming some polyatomic ions; -ate and -ite are suffixes designating polyatomic ions containing more or fewer oxygen atoms. Chemistry 2019-02-14T00:00:00Z What are the electron-pair geometry and molecular structure of this polyatomic ion? Chemistry 2019-02-14T00:00:00Z All the other hexoses, whose structure is shown on pages 37 and 38, occur in plants only as constituents of the more complex saccharides, in glucoside-formations, or as the corresponding polyatomic alcohols. The Chemistry of Plant Life As with simple ionic compounds, these compounds must also be electrically neutral, so their formulas can be predicted by treating the polyatomic ions as discrete units. Chemistry 2019-02-14T00:00:00Z You can choose binary, polyatomic, and variable charge ionic compounds, as well as molecular compounds. Chemistry 2019-02-14T00:00:00Z Some compounds contain polyatomic ions; the names of common polyatomic ions should be memorized. Chemistry 2019-02-14T00:00:00Z |
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