AQA A Level Maths: Pure复习笔记2.6.1 Rational Expressions
Rational Expressions (Algebraic Fractions) What are rational expressions? Rational numbers are numbers that can be written as a fraction (quotient)Rational comes from ratio – a number is rat...
IB DP Chemistry: HL复习笔记3.1.6 Periodic Trends: Chemical
Metallic & Non-metallic Periodic trends can also be seen in the typical properties of metals and non-metals which are summarised below: The typical properties of metals and non-metals The typic...
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...
