AQA A Level Chemistry復(fù)習(xí)筆記3.1.4 Structural Isomerism
Molecules: Straight, Branched & Cyclic Straight, branched and cyclic organic molecules are also called?aliphatic?compounds as long as they do not contain a?benzene ring Straight-chain St...
AQA A Level Chemistry復(fù)習(xí)筆記3.1.3 Nomenclature
Nomenclature Systematic nomenclature?can be used to name organic compounds and therefore make it easier to refer to them The?alkanes?provide the basis of the naming system and the?stem?of ea...
AQA A Level Chemistry復(fù)習(xí)筆記3.1.2 Types of Formulae
Types of Formulae The?general formula?is a formula that represents a?homologous series?of compounds using letters and numbers Eg. the general formula of alkanes is CnH2n+2 A homologous serie...
AQA A Level Chemistry復(fù)習(xí)筆記2.3.4 Uses & Reactions of Chlorine
Reactions of Halide Ions 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 dis...
AQA A Level Chemistry復(fù)習(xí)筆記2.3.3 Testing for Halide Ions
Testing for Halides Silver ions & ammonia Halide ions can be identified in an?unknown?solution?by dissolving the solution in?nitric acid?and then adding?silver nitrate solution dropwise ...
斯坦福及藤校新生成績(jī)分布！美國(guó)TOP大學(xué)偏好錄取什么成績(jī)的學(xué)生？
美國(guó)大學(xué)入學(xué)人數(shù)跌破記錄了！ 明明申請(qǐng)競(jìng)爭(zhēng)那么激烈， 到底是什么情況？ 據(jù)美國(guó)國(guó)家學(xué)生信息中心（National Student Clearinghouse Research Center）最新數(shù)據(jù)顯示：2022年春季本科入學(xué)人數(shù)相較去年減少了66.2萬(wàn)...
AQA A Level Chemistry復(fù)習(xí)筆記2.3.2 Chemical Properties of Group 7
Halogens: 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) → CaCl2?(s)??consisting of?Ca2+?and?...
2022馬歇爾經(jīng)濟(jì)學(xué)會(huì)寫(xiě)作比賽題目已公布，新賽季報(bào)名開(kāi)啟！
馬歇爾學(xué)會(huì)是劍橋大學(xué)的經(jīng)濟(jì)學(xué)會(huì)，馬歇爾經(jīng)濟(jì)學(xué)會(huì)寫(xiě)作比賽（Marshall Society Essay Competition）是面向A-level、IB和其他體系學(xué)生打造的寫(xiě)作比賽，要求學(xué)生利用現(xiàn)實(shí)世界的相關(guān)論據(jù)對(duì)經(jīng)濟(jì)理論進(jìn)行充分解釋和合理...
AQA A Level Chemistry復(fù)習(xí)筆記2.2.4 Uses of Group 2 Elements
Uses of Group 2 Three different calcium compounds are used commonly in agriculture, construction and iron extraction: Limestone?- this is impure calcium carbonate Quicklime?- this is calcium...
AQA A Level Chemistry復(fù)習(xí)筆記2.2.3 Reactions of Group 2
Reactions of Group 2 The group 2 elements react with oxygen, water and dilute acids Group 2 Reactions - Observations Reactions with water and oxygen The reaction of group 2 metals wit...
AQA A Level Chemistry復(fù)習(xí)筆記2.2.2 Solubility of Group 2 Compounds: Hydroxides & Sulfates
Solubility of 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 oxides are ...
CollegeBoard發(fā)布SAT機(jī)考樣題，正式回應(yīng)黃牛考位問(wèn)題
今天，CollegeBoard正式放出了SAT機(jī)考樣題，并采取直播方式對(duì)機(jī)考模式進(jìn)行講解，同時(shí)，首次正面回應(yīng)了黃牛考位問(wèn)題，小編一起來(lái)和大家分享下。 在今年1月份，CB宣布SAT進(jìn)入機(jī)考時(shí)代，國(guó)際考場(chǎng)在2023年春季率先使...
