单词 | isomerism |
释义 | Word Frequency isomerism(aɪˈsɒməˌrɪzəm) noun 1. the existence of two or more compounds having the same molecular formula but a different arrangement of atoms within the molecule See also stereoisomerism, optical isomerism 2. the existence of two or more nuclides having the same atomic numbers and mass numbers but different energy states |
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