| 单词 | valence number |
| 释义 | valence number [`vā·lǝns ´nǝm·bǝr] CHEMISTRY A number that is equal to the valence of an atom or ion multiplied by +1 or -1, depending on whether the ion is positive or negative, or equivalently on whether the atom in the molecule under consideration has lost or gained electrons from its free state. |
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