nontransitional element
... 非化学计量化合物 nonstoichiometric compound 非过渡元素 nontransitional element 当量浓度；N normal (N) ...
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本课程集中研究化学中的非过渡元素及其化合物，并强调其对称，结合，周期性及性质的描述。
This course concentrates on the chemistry of non-transition elements and their compounds, with emphasis on symmetry, bonding, periodic properties and the descriptive chemistry of selected groups.
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