AQA A Level Maths: Pure復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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...
帝國理工環(huán)境生物學學什么？
近幾年，從霧霾、垃圾分類，到現(xiàn)在白鱘滅絕、全網(wǎng)唏噓。政府政策引導，環(huán)保意識已經(jīng)滲透到了生活的方方面面，大勢所趨，環(huán)境科學類專業(yè)是中國核心科技，未來一定大有作為。不過，很多人仍然對這類專業(yè)知之甚少。...
IB DP Chemistry: HL復習筆記2.1.7 Sublevels & Orbitals
Electron Orbitals Each shell can be divided further into?subshells,?labelled?s, p, d and f Each subshell can hold a specific number of orbitals: s subshell : 1 orbital p subshell : 3 orbitals label...
IB DP Chemistry: HL復習筆記2.1.6 Energy Levels & Sublevels
Electron Energy Levels Shells The arrangement of electrons in an atom is called the?electronic?configuration Electrons are arranged around the nucleus in?principal energy levels?or?principal quantu...
IB DP Chemistry: HL復習筆記2.1.5 Emission Spectra
Emission Spectra 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 reversible, so electrons can ret...
IB DP Chemistry: HL復習筆記2.1.4 The Electromagnetic Spectrum
The Electromagnetic Spectrum The?electromagnetic spectrum?is a range of?frequencies?that covers all electromagnetic radiation and their respective?wavelengths?and?energy It is divided into bands or...
