Periodic Table of Elements Erbium - 搜索视频

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起始时间 00:05Introduction to Erbium

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起始时间 00:34Noble Gas is Stable Halogens Alkali React Aggressively

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起始时间 02:04Individual Elements and Symbols

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起始时间 00:35Element Six: Carbon

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起始时间 00:08Key Elements of the Periodic Table

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起始时间 03:32Unique Elements in the Periodic Table

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起始时间 0:00Introduction to Elemental Discovery

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起始时间 01:26Main Group Elements and Transition Metals

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