Edexcel IGCSE Chemistry 复习笔记 2.2.1 Group 7 (Halogens)
Edexcel IGCSE Chemistry 复习笔记 2.2.1 Group 7 (Halogens) Physical Properties The elements in group 7 are known as the halogens These are fluorine, chlorine, bromine, iodine and astatine &nb...
Edexcel IGCSE Chemistry 复习笔记 2.2.1 Group 7 (Halogens) Physical Properties The elements in group 7 are known as the halogens These are fluorine, chlorine, bromine, iodine and astatine &nb...
Edexcel IGCSE Chemistry 复习笔记 2.1.2 Group 1: Reactivity & Electronic Configurations Group 1: Reactivity & Electronic Configurations The reactivity of the group 1 metals increases ...
由于港澳高校众多,其中一些院校在内地知名度不高,导致许多家长对于港澳学历的认证问题有所疑惑,认为只有那几所知名大学的学历才受内地认可,但其实内地认可的港澳院校是非常多的。今天一起来看看港澳学历认证...
Edexcel IGCSE Chemistry 复习笔记 2.1.1 Group 1 (Alkali Metals) How Alkali Metals React with Water The group 1 metals are known as the alkali metals They form alkaline solutions when they rea...
Edexcel IGCSE Chemistry 复习笔记 1.9.4 Practical: Investigate the Electrolysis of Aqueous Solutions Practical: Investigate the Electrolysis of Aqueous Solutions Aim: To electrolyse aqueous solution...
Edexcel IGCSE Chemistry 复习笔记 1.9.3 Writing Half-Equations Writing Half-Equations In electrochemistry we are mostly concerned with the transfer of electrons, hence the definitions of oxid...
Edexcel IGCSE Chemistry 复习笔记 1.9.2 Electrolysis Experiments Electrolysis of Molten Compounds Lead(II) bromide is a binary ionic compound meaning that it is a compound consisting of just ...
Nuclear Radius Values The radius of some nuclei are shown in the table below: In general, nuclear radii are of the order 10–15 m or 1 fm The nuclear radius, R, varies with nucleon number, A ...
Closest Approach Estimate The Coulomb equation can be used to give an estimate for the radius of a nucleus When the alpha particle reaches its closest approach (to the nucleus), all of its k...
2022年秋季申请季已经全面拉开帷幕,美国作为留学生热门选择的求学地之一,与往年不同的是,考虑到疫情等原因,一直以来鲜有变化的申请截止日期、申请要求等,今年都发生了重大变化。今天一起来了解美国网申系统...
Estimating Nuclear Radius Closest Approach Method In the Rutherford scattering experiment, alpha particles are fired at a thin gold foil Some of the alpha particles are found to come straigh...
Nuclear Excited States In the same way that electrons can exist in excited states, nuclei can also exist in excited states After an unstable nucleus emits an alpha particle, beta particle or...
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