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Halogen atoms contain seven electrons in their valence shell.卤原子在它们的介电子层含有七个电子.Hydrogen is a one - valence element.氢是一价的元素.Evaluate the evenhanded affirms valence can reflect investment both sides more, justice.评估确认价更能体现...
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Hydrogen is a one - valence element.氢是一价的元素.Valence is a sleepy little town just south of Lyon.瓦朗斯是里昂南面一座寂静的小镇。Every element tends to satisfy both its primary and secondary valence.每一元素倾向于既满足它的主价又要满足它的副价....
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Valence的音标：Valence的英式发音音标为：['veɪləns]Valence的美式发音音标为：['veɪləns]...