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COUNTDOWN
Time left for paper 4 Time lef […]
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5.1 Enthalpy change, ΔH
1. Thermochemical equation 1) […]
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Summary of bonding and structure
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Marked notes
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Definition
Glossary
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2.4 Ions and ionic bonds
1. Formation of ion Group I Li […]
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Names of ionic compounds
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Ionic bonding and structure
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12.4 Separation and purification
Separating and purification ar […]
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G9 Chem activities in lab
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Apparatus
Apparatus 仪器名字 Diagram Usag…