2022剑桥TMUA数学考试介绍，哪些学校和专业需要TMUA？
TMUA这两年突然“异军突起”，先是2021年剑桥宣布所有申请计算机科学的学生都要考 TMUA；再是今年剑桥砍掉 ECAA，改为 TMUA。可以说 TMUA 是这两年剑桥最重视的考试了！连LSE 都官网鼓励申请学生考TMUA。为什么TMUA...
CIE A Level Chemistry复习笔记3.2.9 Test for Unsaturation
Test for Unsaturation Halogens can be used to test if a molecule is unsaturated (i.e. contains a double bond) Br2(aq) is an orange or yellow solution, called bromine water and this is the halogen m...
CIE A Level Chemistry复习笔记3.2.8 Reactions of Alkenes
Reactions of Alkenes Alkenes are very useful compounds as they can undergo many types of reactions They can therefore be used as starting molecules when making new compounds Electrophilic addition ...
CIE A Level Chemistry复习笔记3.2.7 Production of Alkenes
Production of Alkenes: Elimination, & Dehydration Reactions & Cracking Alkenes can be made by a series of reactions including elimination, dehydration reactions and cracking Elimination rea...
CIE A Level Chemistry复习笔记3.2.6 Combustion of Alkanes
Combustion of Alkanes & the Environment Cars’ exhaust fumes include toxic gases such as carbon monoxide (CO), oxides of nitrogen (NO/NO2) and volatile organic compounds (VOCs) When released int...
CIE A Level Chemistry复习笔记3.2.5 Chemical Reactivity of Alkanes
Unreactivity of Alkanes Strength of C-H bonds Alkanes consist of carbon and hydrogen atoms which are bonded together by single bonds Unless a lot of heat is supplied, it is difficult to break these...
CIE A Level Chemistry复习笔记3.2.4 Cracking of Alkanes
Obtaining Useful Compounds by Cracking Crude oil Crude oil is a mixture of hydrocarbons containing alkanes, cycloalkanes and arenes (compounds with a benzene ring) The crude oil is extracted from t...
CIE A Level Chemistry复习笔记3.2.3 Free Radical Substitution
Free Radical Substitution Mechanism Alkanes can undergo free-radical substitution in which a hydrogen atom gets substituted by a halogen (chlorine/bromine) Ultraviolet light (sunlight) is needed fo...
CIE A Level Chemistry复习笔记3.2.2 Combustion & Free Radical Substitution of Alkanes
Combustion & Free Radical Substitution of Alkanes Alkanes are combusted (burnt) on a large scale for their use as fuels They also react in free-radical substitution reactions to form more react...
CIE A Level Chemistry复习笔记3.2.1 Alkanes
Production of Alkanes: Hydrogenation & Cracking Alkanes are hydrocarbons that can be produced by the addition reaction of hydrogen to an alkene or by cracking of longer alkane chains Production...
2022年英国经济专业TOP5院校介绍及专业招生要求
2023年申请季已经到来，大家是否已经有了目标院校和专业呢？ 经济学一直是备受广大家长和同学青睐的专业。如果想去英国读经济，哪些大学最值得读呢？ 今天我们就结合三大权威榜单（2022QS世界大学学科排名、2022...
CIE A Level Chemistry复习笔记3.1.13 Isomers of Organic Compounds
Deducing Isomers of a Compound You should be able to deduce all possible isomers for organic compounds knowing their molecular formula Worked example: Isomers of dibromopropane Step 1: Draw the str...
