2022马歇尔经济论文赛题公布，IEA全球高中生经济学论文比赛本月截止！
由剑桥大学经济学会举办 一次参赛即可get：扎实的经济学理论知识 强大的逻辑论证能力 专业严谨的学术写作能力 ... 马歇尔学会经济论文比赛 Marshall Society Essay Competition 公布2022年赛事题目啦！2022马歇尔...
2022BPhO英国物理奥赛，2022备赛报名倒计时！
BPhO英国物理奥赛 始于1979年，1983年正式为英国选拔国家代表队参与国际物理学术活动。该学术活动也被称为牛剑物理工程学子标配赛。英国物理奥赛非常注重物理知识的灵活运用，全部的试题为证明题。同学们需要运用...
2022牛剑官方书单、网站、各类资源汇总！
盼望着盼望着，暑假终于来了！在放松心情之余，大家也有了更充裕的时间可以投入到自己想做的事情上去。针对本科申请者的暑期安排，牛剑官方纷纷更新了“课外学习资源清单”，直接将各类珍贵学习资源一网打尽，大家...
2022AP成绩即将出分，如何查分/送分/复议/取消/隐藏？
2022 AP考试成绩将在7月5日全球同步发送，每位考生可以通过自己的AP学生账号在线查询成绩。但拿到考试成绩不是终点，还需要留意后续的成绩相关流程。 接下来这篇文章会针对同学关心的问题：查分/送分/复议/取消/...
AQA A Level Chemistry复习笔记8.3.4 Required Practical 12
Separation of species by TLC Required practical 12: Separation of species by thin-layer chromatography This practical covers two key laboratory skills use thin-layer or paper chromatography safely ...
AQA A Level Chemistry复习笔记8.3.3 Testing Aldehydes & Ketones
Tollens' Reagent Testing Distinguishing Between Aldehydes & Ketones Weak oxidising agents can be used to distinguish between an aldehyde and a ketone The aldehyde will be oxidised to a c...
AQA A Level Chemistry复习笔记8.3.2 Required Practical 10b
Preparation of an Ester This required practical covers the following mandatory skills use water bath or electric heater or sand bath for heating use laboratory apparatus for a variety of exp...
AQA A Level Chemistry复习笔记8.2.9 Reactions of Metal-Aqua Ions
Reactions of Metal-Aqua Ions In this practical activity, test tube reactions of copper(II), iron(II), iron(III) and aluminium ions with three bases are investigated 10 drops of the metal-aqu...
AQA A Level Chemistry复习笔记8.2.8 Identifying Ions
Identifying Ions Testing for positive ions Simple test tube reactions can be done to identify the following positive ions: Group 2 ions (M2+) Ammonium ions (NH4+) If the sample to be ...
AQA A Level Chemistry复习笔记8.2.7 Autocatalysis Experiments
Autocatalysis Experiments Autocatalysis Experiment - Titration with sodium thiosulfate Autocatalysis occurs when one of the products catalyses the reaction Potassium manganate(VII) will reac...
AQA A Level Chemistry复习笔记8.2.6 Colorimetry & Complex Ions
Colorimetry & Complex Ions Colorimetry & Complex Ions Colorimetry can be used to measure the absorption of radiation using a colorimeter This uses a lamp as a source of white light, ...
AQA A Level Chemistry复习笔记8.2.5 Vanadium Oxidation States
Vanadium Oxidation States Vanadium Oxidation States Vanadium is a transition metal which has variable oxidation states Vanadate(V) ions can be reduced to oxidised vanadium species with the o...
