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S4_CHEM_CH8_D_ Dative covalent bond

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S4_CHEM_CH8_E_ Formula mass and relative molecular mass

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Longitudinal waves 3

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S4_CHEM_CH8_B1_ Electron diagram of covalent substances

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S4_化學_CH9_E2_巨型金屬結構

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S4_化學_CH9_F2_利用物質的性質來推斷它們的結構和鍵合

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S4_CHEM_CH9_E2_ Giant metallic structures

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S4_CHEM_CH8_C1_ Structural formula and molecular formula

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S4_化學_CH9_D1_二氧化碳和碘的結構

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