2022-23CTB全球创新研究大挑战火热组队中,全新课题等你来解锁!
CTB 全球创新研究大挑战来啦!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...
CTB 全球创新研究大挑战来啦!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...
Group 2 Elements Reactions with water and oxygen The reaction of group 2 metals with oxygen follows the following general equation: 2M (s) + O2 (g) → 2MO (s) Where M is any metal in group 2 ...
Ionisation Energy Chemical trends All elements in Group 2 (also called alkali earth metals) have two electrons in their outermost principal quantum shell All Group 2 metals can form ionic co...
Writing Chemical Formulae Oxidation numbers are a useful tool for naming compounds as some elements can exist with more than one oxidation number For compound with two elements it is straigh...
Disproportionation Disproportionation reactions A disproportionation reaction is a reaction in which the same species is simultaneously oxidised and reduced Example of a disproportion reacti...
Electron Transfer & Change in Oxidation Number Oxidation and reduction in a reaction can be demonstrated in terms of electron transfer For example: 2NH3 + 3Br2 → N2 + 6HBr The oxidation ...
Defining Oxidation Number There are three definitions of oxidation and reduction used in different branches of chemistry Oxidation and reduction can be used to describe any of the following...
世界专业排名机构之一U.S.News&WorldReport《美国新闻与世界报道》(下面简称U.S.News)官方网站公开发布了2023年全美最佳大学排名表最新排名! 1,排名指数 排名的因素以及权重与去年基本一致,只是在细分的...
stem专业在美国好就业吗?这是现在很多留美学生比较关心的。后疫情时期美国经济复苏迅速,中国大陆在美主修STEM(科学、技术、工程、数学)的留学生找工作不难。 一些学校不完全统计,留美的中国学生中毕业前找到工...
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