Edexcel A Level Chemistry:复习笔记1.2.2 Quantum Shells
Developing Electronic Configuration Electrons move rapidly around the nucleus in energy shells If their energy is increased, then they can jump to a higher energy level The process is revers...
Edexcel A Level Chemistry:复习笔记1.2.1 Ionisation Energy
Factors Affecting Ionisation Energy Ionisation energy The?ionisation?Energy?(IE) of an element is the amount of energy required to remove?one mole?of electrons from?one mole?of gaseous atoms...
Edexcel A Level Chemistry:复习笔记1.1.4 Mass Spectrometry
Interpreting Mass Spectra Isotopes are different atoms of the same element that contain the same number of protons and electrons but a different number of neutrons These are atoms of the sam...
Edexcel A Level Chemistry:复习笔记1.1.3 Relative Mass
Isotopic & Atomic Mass The relative mass of an atom uses the carbon-12 isotope as the international standard One atom of carbon-12 has an accepted mass of 1.992646538 x 10-26?kg It is not reali...
Edexcel A Level Chemistry:复习笔记1.1.2 Isotopes
Atomic Structure Calculations An atom is?neutral?and has no overall charge Ions on the other hand are formed when atoms either?gain?or?lose?electrons, causing them to become?charged The numb...
Edexcel A Level Chemistry:复习笔记1.1.1 Structure of the Atom
Structure of the Atom All matter is composed of?atoms, which are the smallest parts of an element that can take place in?chemical reactions Atoms are mostly made up of?empty?space?around a v...
CIE A Level Maths: Pure 3复习笔记8.3.3 Square Roots of a Complex Number - Advanced
Square Roots of a Complex Number - Advanced Previously we looked at how to find the square roots of a complex number in Cartesian form (a+bi). We can also find square roots using polar ?and ...
A-level课程学三门够吗？
关注英国留学的家长们都知道，英国中学的课程，无论是GCSE还是A-Level，都是选课制。A-level课程学三门够吗？ 拿离大学更近的A-Level来说，A-Level课程共有70多门科目供学生选择，但最终用来申请大学的只有学生选...
CIE A Level Maths: Pure 3复习笔记8.3.2 Geometry of Complex Multiplication & Division
Geometry of Complex Multiplication & Division You now know how conjugation, addition and subtraction affect the geometry of complex numbers on an Argand diagram. Now we can look at the e...
