CAIE A-Level成绩放榜，各科目分数线已出！
CAIE剑桥国际考评部已经于2022年8月11日公布了今年夏季Alevel大考成绩。已经查到成绩的同学们都考得怎么样呢？都考到了目标分数了吗？ 虽然今年国内部分地区因为疫情采用了POE的评分方式，但大部分同学还是参加了...
CIE A Level Chemistry复习笔记6.2.6 Geometry of Complexes
Geometry of the Transition Element Complexes Depending on the size of the ligands and the number of dative bonds to the central metal ion, transition element complexes have different geometries Dat...
CIE A Level Chemistry复习笔记6.2.5 Defining Complexes
Define Complex A complex is a molecule or ion formed by a central metal atom or ion surrounded by one or more ligands A ligand is a species that contains one or more lone pairs of electrons The lig...
CIE A Level Chemistry复习笔记6.2.4 Ligands
Define Ligand A ligand is a molecule or ion that has one or more lone pairs of electrons These lone pairs of electrons are donated by the ligand, to form dative covalent bonds to a central metal at...
CIE A Level Chemistry复习笔记6.2.3 Transition Metal Complexes
Transition Elements: Ligands & Complex Formation Transition element ions can form complexes which consist of a central metal ion and ligands Copper(II) and cobalt(II) ions will be used as examp...
CIE A Level Chemistry复习笔记6.2.2 Oxidation States of Transition Metals
Effects of the 3d & 4s Subshells on Oxidation States of the Transition Elements Transition elements can have variable oxidation states These variable oxidation states can be formed as the 3d an...
CIE A Level Chemistry复习笔记6.2.1 General Properties of the Transition Elements: Titanium to Copper
Define Transition Element Transition elements are d-block elements which form one or more stable ions with an incomplete d subshell They are all metals found in the d-block of the Periodic Table, b...
CIE A Level Chemistry复习笔记6.1.1 Similarities, Trends & Compounds of Magnesium to Barium
Effect of Ionic Radius on Thermal Stability of Group 2 Nitrates & Carbonates The Group 2 nitrates and carbonates become more thermally stable going down the group The charge density of the cati...
CIE A Level Chemistry复习笔记5.6.7 Homogeneous & Heterogeneous Catalysts
Homogeneous & Heterogeneous Catalysis Catalysts increase the rate of reaction by providing an alternative pathway which has a lower activation energy Catalysts can be either homogeneous or hete...
ssat阅读怎么学？我们需要把握哪些重点？
ssat阅读怎么学？很多同学在做SSAT题目的初期都很不适应，多数会与托福阅读产生比较。SSAT是一种测试学术能力的考试，在阅读上就体现为对考生理解能力的考查，考查的要求也不仅仅是看懂文章，而是要求真正理解文...
CIE A Level Chemistry复习笔记5.6.6 Factors affecting Rate Constant
Effect of Temperature on the Rate Constant At higher temperatures, a greater proportion of molecules have energy greater than than the activation energy Since the rate constant and rate of reaction...
CIE A Level Chemistry复习笔记5.6.5 Multi-Step Reactions
Kinetics of Multi-Step Reactions The reaction mechanism of a reaction describes how many steps are involved in the making and breaking of bonds during a chemical reaction It is the slowest step in ...
