ISSCY联合国高中人文社科写作比赛获奖作品赏析，附ISSCY写作策略
ISSCY联合国高中人文社科写作比赛是一个面向全世界高中生的研究学术活动，由联合国协会世界联合会（WFUNA）、美国青年会（YOUTHECA USA）等其他全球非政府组织共同主办和赞助的，作为高度竞争的活动项目，此学术...
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...
CIE A Level Chemistry复习笔记2.2.1 Reactions of Group 2 Elements
Reactions of Group 2 Elements The Group 2 elements react with oxygen, water and dilute acids Group 2 reactions table Group 2 reactions with oxygen & water chemical equations Group 2 reactions w...
CIE A Level Chemistry复习笔记2.1.8 Chemical Periodicity of Other Elements
Periodicity: Predicting Position & Properties If the chemical and physical properties of an element are known, the position of that element in the Periodic Table can be predicted Similarly, pre...
CIE A Level Chemistry复习笔记2.1.7 Period 3 Chlorides & Oxides
Bonding in Period 3 Chlorides & Oxides Period 3 chlorides The bonding and structure of the Period 3 elements are summarised in the table below: The table shows that Na, Mg and Al are metallic e...
CIE A Level Chemistry复习笔记2.1.6 Period 3 Elements: Electronegativity & Bonding
Period 3: Trends in Electronegativity & Bonding Electronegativity Electronegativity is the power of an element to draw the electrons towards itself in a covalent bond Going across the period, t...
CIE A Level Chemistry复习笔记2.1.5 Period 3 Chlorides
Reaction of Period 3 Chlorides & Water Chlorides of Period 3 elements show characteristic behaviour when added to water which can be explained by looking at their chemical bonding and structure...
CIE A Level Chemistry复习笔记2.1.4 Period 3 Oxides & Hydroxides: Acid/Base Behaviour
Acid / Base Behaviour of Period 3 Oxides & Hydroxides Period 3 oxides Aluminium oxide is amphoteric which means that it can act both as a base (and react with an acid such as HCl) and an acid (...
CIE A Level Chemistry复习笔记2.1.3 Period 3 Oxides
Period 3: Oxides Reactions with oxygen & chlorine Reaction of Period 3 elements with oxygen table Reaction of Period 3 elements with chlorine table Reaction of sodium & magnesium with water...
