Edexcel A Level Chemistry:復習筆記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:復習筆記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:復習筆記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:復習筆記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:復習筆記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:復習筆記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...
全球大學億萬富翁校友數量榜單：斯坦福超7千人，哈佛強勢登頂！
全球哪些大學“盛產”億萬富翁？ 最近美國數據咨詢機構Altrata發布了一份全球大學校友富豪排行榜。 將個人資產凈值超過3000萬美元（約2億人民幣）人士定義為超高凈值（Ultra high net worth | UHNW)人士為標準，并...
2022DC鉆石創業挑戰賽新賽季組隊備賽已開啟！
商科專業一直是中國留學生青睞的熱門專業之一，每年的申請競爭壓力也不小。 想要申請相關院校和專業，對于商科的熱情很重要。美國大學很看重你在這一領域的投入、參加的活動、為社區做出的貢獻等等。 今年獲得NYU...
2022-23CTB全球創新研究大挑戰組隊中！MIT、哈佛學長力薦的PBL賽事全新課題來襲！
關注PBL賽事的家長和同學，CTB這個賽事對大家應該并不陌生。China Thinks Big（簡稱CTB），由哈佛商學院和清華大學經管學院學者聯合啟動，是以學術研究和社會實踐推動社會創新的國際高中生創新活動。 參加過CTB的...
500強最喜歡的20所美國大學是哪些？
其實想要獲得好的工作，道路有很多。但可以確定的是，從好的大學畢業可能會讓你更容易在大企業中找到一份工作。但這并不是一勞永逸的。那么，500強最喜歡的20所美國大學是哪些？ 此前，DegreeChoices網站根據Link...
Edexcel A Level Chemistry:復習筆記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:復習筆記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...
