valence-shell
| electron pair repulsion theory
| valence shell | |
| met. | 价电子层 |
| electron-pair repulsion theory | |
| chem. | 电子对互斥理论 |
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| 价电子层 | |||
| 价壳层 | |||
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valence-shell : 2 phrases in 1 subject |
| Chemistry | 2 |