Edexcel A Level Chemistry:复习笔记7.1.1 Chirality
Optical isomers A carbon atom that has four different atoms or groups of atoms attached to it is called a chiral carbon or chiral centre Chira comes from a Greek word meaning hand, so we talk about...
2023年AP考试报名已开启，AP文科各科目难度系数和五分率盘点！
9月19日，美国大学理事会College Board 宣布大陆2023年AP考试报名正式开启。在2022-23学年，大学理事会继续与Prometric合作管理国内的AP考试报名和考务工作。很多家长和学员询问应该报考什么科目？什么科目好学好...
2023年AP考试报名已开启，AP理科各科目难度系数和五分率盘点！
9月19日，美国大学理事会College Board 宣布大陆2023年AP考试报名正式开启。在2022-23学年，大学理事会继续与Prometric合作管理国内的AP考试报名和考务工作。很多家长和学员询问应该报考什么科目？什么科目好学好...
2023年AP考试报名正式开启，附报名流程！不同专业方向如何选择报考科目？
9月19日，美国大学理事会College Board 宣布大陆2023年AP考试报名正式开启。在2022-23学年，大学理事会继续与Prometric合作管理国内的AP考试报名和考务工作。 美国大学先修课程(Advanced Placement)，简称AP课程...
2020年丘奖物理金奖作品解析
作为提交截止时间最晚的赛区，丘奖内地赛区的论文提交即将截止，剩余时间不足一周！ 作为由数学大师丘成桐先生亲自发起设立的中学生科学创新类奖项，丘奖从十四年前单一的数学奖，发展到今天的数学奖、物理奖、化...
Edexcel A Level Chemistry:复习笔记6.3.4 Ligand Exchange
Ligand Exchange Ligand exchange (or ligand substitution) is when one ligand in a complex is replaced by another Ligand exchange forms a new complex that is more stable than the original one ...
Edexcel A Level Chemistry:复习笔记6.3.3 Reactions of Ions in Aqueous Solution
Reactions with Hydroxide & Ammonia When transition metal ions in aqueous solution react with aqueous sodium hydroxide and aqueous ammonia they form precipitates However some of these pre...
Edexcel A Level Chemistry:复习笔记6.3.2 Chromium
Reduction & Oxidation of Chromium Species For chromium we need to consider the following standard electrode potential values We will use zinc and hydrogen peroxide as oxidising agents Th...
Edexcel A Level Chemistry:复习笔记6.3.1 Vanadium
Colours & Oxidation States Vanadium is a transition metal which has variable oxidation states The table below shows the important ones you need to be aware of Addition of zinc to the van...
