Edexcel IGCSE Chemistry 复习笔记 2.2.2 Group 7: Reactivity & Electronic Configurations Group 7: Reactivity & Electronic Configurations When halogen atoms gain an electron during reac...
Constant Density of Nuclear Material Assuming that the nucleus is spherical, its volume is equal to: Where R is the nuclear radius, which is related to mass number, A, by the equation: Where...
最近，非常多同学学习Alevel生物。而生物作为一个探究人生奥秘的热门学科，却似乎因为专业性强，门槛高将同学们拒之于外。相信同学们都幻想过，忽然有一天学习生物变得有趣又令人着迷，再也不会枯燥了。这种想法...
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...
