2022招生季，上海美达菲学校面向全国招生！
上海美达菲学校(The MacDuffie School) 由哈佛大学毕业的美达菲夫妇创立于1890年，至今已有132年历史，学校坐落在全美教育资源集中的新英格兰地区。2022年国际学校招生季，上海美达菲学校面向全国招生！ 上海美达...
CIE A Level Chemistry复习笔记3.1.4 Molecular & Empirical Formulae
Molecular & Empirical Formulae of Organic Compounds The molecular formula shows the number and type of each atom in a molecule Eg. the molecular formula of ethanoic acid is C2H4O2 The empirical...
CIE A Level Chemistry复习笔记3.1.3 Naming of Organic Compounds
Nomenclature of Aliphatic Compounds Systematic nomenclature can be used to name organic compounds and therefore make it easier to refer to them The alkanes provide the basis of the naming system an...
CIE A Level Chemistry复习笔记3.1.2 Functional Groups and their Formulae
Functional Groups of Organic Compounds Functional groups determine the physical and chemical properties of molecules The table below shows a summary of common functional groups found in compounds R...
CIE A Level Chemistry复习笔记3.1.1 Hydrocarbons & Alkanes
Homologous Series Organic chemistry is the chemistry of carbon compounds Carbon forms a vast number of compounds because it can form strong covalent bonds with itself This enables it to form long c...
CIE A Level Chemistry复习笔记2.4.2 Nitrogen Oxides
Oxides of Nitrogen Natural occurrence of nitrogen oxides Due to its lack of reactivity, only under extreme conditions will nitrogen react with oxygen to form gaseous nitrogen oxides An example of t...
CIE A Level Chemistry复习笔记2.4.1 Nitrogen and its Compounds
Reactivity of Nitrogen Nitrogen is a diatomic molecule and the main unreactive gas in air 78% of air is nitrogen gas The lack of reactivity of nitrogen gas can be explained by looking at its intram...
CIE A Level Chemistry复习笔记2.3.4 The Reactions of Chlorine
Reaction of Chlorine A disproportionation reaction is a reaction in which the same species is both oxidised and reduced The reaction of chlorine with dilute alkali is an example of a disproportiona...
CIE A Level Chemistry复习笔记2.3.3 Reactions of the Halide Ions
Halide Ions: Reducing Agents Halide ions can also act as reducing agents and donate electrons to another atom The halide ions themselves get oxidised and lose electrons The reducing power of the ha...
2022 ISSCY联合国高中人文社科写作比赛报名8月底截止，附参赛时间及比赛规则
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CIE A Level Chemistry复习笔记2.3.2 Chemical Properties: Halogens & Hydrogen Halides
Group 17: Oxidising Agents Halogens react with metals by accepting an electron from the metal atom to become an ion with 1- charge Eg. Ca(s) + Cl2(g) → Ca2+(Cl-)2(s) Halogens are therefore oxidis...
CIE A Level Chemistry复习笔记2.3.1 Physical Properties of the Group 17 Elements
Group 17: Physical Trends The group 17 elements are called halogens The halogens have uses in water purification and as bleaches agents (chlorine), as flame-retardants and fire extinguishers (bromi...
