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...
Edexcel A Level Chemistry:复习笔记6.2.12 Autocatalysis
Manganese(II) ions as an Autocatalyst Autocatalysis the term used to describe a reaction which is speeded up by a product which acts as a catalyst for the reaction If you plot a rate graph o...
Edexcel A Level Chemistry:复习笔记6.2.11 Homogeneous Catalysis
Homogeneous Catalysts Homogeneous catalyst is in the same physical state (phase) as the reactants This means they are either all gases, or more often, all in aqueous solution Homogenous cata...
Edexcel A Level Chemistry:复习笔记6.2.10 Heterogeneous Catalysis
Heterogeneous Catalysts A heterogeneous catalyst is in a different physical state (phase) from the reactants Heterogeneous catalysts are usually solids whereas the reactants are gaseous or i...
Edexcel A Level Chemistry:复习笔记6.2.9 Catalysis
Properties of Catalysts Transition metals are often used as catalysts in the elemental form or as compounds The ability of transition metals to form more than one stable oxidation state mean...
Edexcel A Level Chemistry:复习笔记6.2.8 Haemoglobin
Haemoglobin Haemoglobin is one of nature's complexes using a transition metal ion The haem molecule is a complex with iron(II) at its centre The haemoglobin complex contains a multidentate l...
全球大学亿万富翁校友数量榜单：斯坦福超7千人，哈佛强势登顶！
全球哪些大学“盛产”亿万富翁？ 最近美国数据咨询机构Altrata发布了一份全球大学校友富豪排行榜。 将个人资产净值超过3000万美元（约2亿人民币）人士定义为超高净值（Ultra high net worth | UHNW)人士为标准，并...
2022DC钻石创业挑战赛新赛季组队备赛已开启！
商科专业一直是中国留学生青睐的热门专业之一，每年的申请竞争压力也不小。 想要申请相关院校和专业，对于商科的热情很重要。美国大学很看重你在这一领域的投入、参加的活动、为社区做出的贡献等等。 今年获得NYU...
2022-23CTB全球创新研究大挑战组队中！MIT、哈佛学长力荐的PBL赛事全新课题来袭！
关注PBL赛事的家长和同学，CTB这个赛事对大家应该并不陌生。China Thinks Big（简称CTB），由哈佛商学院和清华大学经管学院学者联合启动，是以学术研究和社会实践推动社会创新的国际高中生创新活动。 参加过CTB的...
500强最喜欢的20所美国大学是哪些？
其实想要获得好的工作，道路有很多。但可以确定的是，从好的大学毕业可能会让你更容易在大企业中找到一份工作。但这并不是一劳永逸的。那么，500强最喜欢的20所美国大学是哪些？ 此前，DegreeChoices网站根据Link...
Edexcel A Level Chemistry:复习笔记6.2.7 Cis-platin
Cis-platin Sometimes, complexes with four coordinate bonds may adopt a square planar geometry instead of a tetrahedral one Cyanide ions (CN-) are the most common ligands to adopt this geomet...
Edexcel A Level Chemistry:复习笔记6.2.6 Tetrahedral Complexes
Tetrahedral Complexes When there are four coordinate bonds the complexes often have a tetrahedral shape Complexes with four chloride ions most commonly adopt this geometry Chloride ligands a...
