Edexcel IGCSE Chemistry 復習筆記 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，非常多同學學習Alevel生物。而生物作為一個探究人生奧秘的熱門學科，卻似乎因為專業性強，門檻高將同學們拒之于外。相信同學們都幻想過，忽然有一天學習生物變得有趣又令人著迷，再也不會枯燥了。這種想法...
Edexcel IGCSE Chemistry 復習筆記 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 復習筆記 2.1.2 Group 1: Reactivity & Electronic Configurations Group 1: Reactivity & Electronic Configurations The reactivity of the group 1 metals?increases?...
由于港澳高校眾多，其中一些院校在內地知名度不高，導致許多家長對于港澳學歷的認證問題有所疑惑，認為只有那幾所知名大學的學歷才受內地認可，但其實內地認可的港澳院校是非常多的。今天一起來看看港澳學歷認證...
Edexcel IGCSE Chemistry 復習筆記 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 復習筆記 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 復習筆記 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 復習筆記 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...
