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S5_CHEM_CH47_B2_ Periodic variations of physical properties of elements(Variation in electrical conductivity)

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S5_化學_CH48_B_由Na至Cl各元素氧化物的酸鹼性質

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S5_CHEM_CH48_A_ Bonding and stoichiometric composition of the oxides of elements from Na to Cl

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S5_CHEM_CH48_B_ Acid-base properties of the oxides of elements from Na to Cl

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S5_化學_CH49_B_過渡性金屬的有色離子

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S5_CHEM_CH49_A_ Positions and characteristic properties of transition metals in the Periodic Table

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S5_CHEM_CH49_B_ Coloured ions of transition metals

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S5_CHEM_CH49_C1_ Variable oxidation states of transition metals

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S6_化學_CH50_B_工業過程的利弊

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