GCSE必修科目有哪些？
GCSE必修科目有哪些？ GCSE或IGCSE科目众多，Edexcel GCSE提供52门考试，IGCSE有43门考试，CAIE考试局的IGCSE有70余门考试。不论是英国本土还是国内的国际学校，一般会要求学生在GCSE/IGCSE阶段学习8-10门课程。...
IB DP Chemistry: HL复习笔记3.1.5 Periodic Trends: Physical - Electronegativity
Electronegativity: Definition Electronegativity is the ability of an atom to attract a pair of electrons towards itself in a covalent bond This phenomenon arises from the positive nucleus’s ability...
AQA A Level Maths: Pure复习笔记2.5.4 Factorisation
Polynomial Factorisation What is polynomial factorisation? Factorising a polynomial combines the factor theorem with the method of polynomial division The goal is to break down a polynomial ...
IB DP Chemistry: HL复习笔记3.1.4 Periodic Trends: Physical - Electron Affinity
Electron Affinity When atoms gain electrons they become negative ions or anions Electron affinity (EA) can be thought of as the opposite process of ionisation energy and is defined as The amount of...
AQA A Level Maths: Pure复习笔记2.5.3 Factor Theorem
Factor Theorem What is the factor theorem? The factor theorem is a very useful result about polynomials A polynomial is an algebraic expression consisting of a finite number of terms, with n...
IB DP Chemistry: HL复习笔记3.1.3 Periodic Trends: Physical - Ionisation Energy
First 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 atoms of an element in the gaseous state to form o...
IB DP Chemistry: HL复习笔记3.1.2 Periodic Trends: Physical - Atomic & Ionic Radius
Atomic & Ionic Radius Atomic radius The atomic radius of an element is a measure of the size of an atom It is the distance between the nucleus of an atom and the outermost electron shell It can...
IB DP Chemistry: HL复习笔记3.1.1 The Periodic Table
Structure of the Periodic Table The periodic table is a list of all known elements arranged in order of increasing atomic number, from 1 to 118. In addition to this, the elements are arranged in su...
IB DP Chemistry: HL复习笔记2.1.8 Writing Electron Configurations
Electron Configurations: Basics The electron configuration gives information about the number of electrons in each shell, subshell and orbital of an atom The subshells are filled in order of increa...
