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...
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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...
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CIE A Level Chemistry复习笔记2.2.5 Group 2: Trends in Solubility of Hydroxides & Sulfates
Trends in Solubility in Group 2 Hydroxides & Sulfates Group 2 hydroxides Going down the group, the solutions formed from the reaction of Group 2 oxides with water become more alkaline When the ...
CIE A Level Chemistry复习笔记2.2.4 Group 2: Physical & Chemical Trends
Group 2: Physical & Chemical Trends Chemical trends All elements in Group 2 (also called alkali earth metals) have the two electrons in their outermost principal quantum shell All Group 2 metal...
CIE A Level Chemistry复习笔记2.2.3 Thermal Decomposition of Nitrates & Carbonates
Group 2: Thermal Decomposition of Nitrates & Carbonates Thermal decomposition is the breakdown of a compound into two or more different substances using heat Thermal decomposition of carbonates...
CIE A Level Chemistry复习笔记2.2.2 Reactions of Group 2 Oxides, Hydroxides & Carbonates
Reactions of Group 2 Oxides, Hydroxides & Carbonates Reactions of Group 2 oxides with water All Group 2 oxides are basic, except for BeO which is amphoteric (it can act both as an acid and base...
