AQA A Level Chemistry復習筆記1.9.1 Oxidation & Reduction
Oxidation & Reduction There are three definitions of?oxidation?and?reduction? used in different branches of chemistry Oxidation?and?reduction?can be used to describe any of the following proces...
AQA A Level Chemistry復習筆記1.8.1 Chemical Equilibria
Reversible Reactions & Dynamic Equilibrium Reversible reaction Some reactions go to completion where the reactants are used up to form the products and the reaction stops when all of the reacta...
AQA A Level Chemistry復習筆記1.7.1 Collision Theory
Collision Theory Collision theory The?collision theory?states that for a chemical reaction to take place the particles need to?collide?with each other in the correct?orientation?and with enough?ene...
AQA A Level Chemistry復習筆記1.6.1 Bond Energy
Bond Energy During a reaction, enthalpy changes take place because bonds are being broken and formed Energy (in the form of heat) is needed to overcome attractive forces between atoms Bond breaking...
AQA A Level Chemistry復習筆記1.5.1 Shapes of Simple Molecules & Ions
Electron Pairs The?valence shell electron pair repulsion theory?(VSEPR) predicts the shape and bond angles of molecules Electrons are?negatively charged?and will repel other electrons when close to...
AQA A Level Chemistry復習筆記1.4.1 Changes in State: Energy Changes
State Changes Changes of state are?physical changes?that are reversible These changes do not change the chemical properties or chemical makeup of the substances involved Vaporization?includes?evapo...
AQA A Level Chemistry復習筆記1.3.1 The Mole & the Avogadro Constant
Mole & Avogadro Constant The?Avogadro constant?(NA?or?L) is the number of particles equivalent to the relative?atomic?mass?or?molecular mass?of a substance The Avogadro constant applies to atom...
AQA A Level Chemistry復習筆記1.2.1 Relative Atomic Mass & Relative Molecular Mass
Relative Masses Atomic Mass Unit The mass of a single atom is so small that it is impossible to weigh it directly Atomic masses are therefore defined in terms of a?standard?atom which is called the...
AQA A Level Chemistry復習筆記1.1.1 Fundamental Particles
Structure of an 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 very smal...
