Edexcel A Level Chemistry:复习笔记1.5.7 Covalent Structures
Simple Molecular Compounds Simple Molecular Compounds Covalent substances tend to have small molecular structures, such as Cl2, H2O or CO2 These small molecules are known as?simple molecules...
Edexcel A Level Chemistry:复习笔记1.5.6 Giant Lattices
Giant Lattices Ionic Lattices The ions form a?lattice?structure?which is an evenly distributed?crystalline?structure Ions in a lattice are arranged in a?regular?repeating?pattern?so that pos...
Edexcel A Level Chemistry:复习笔记1.5.5 Metallic Bonding
Metallic Bonding Metal?atoms are tightly packed together in?lattice?structures When the metal atoms are in lattice structures, the electrons in their outer shells are free to move throughout...
Edexcel A Level Chemistry:复习笔记1.5.4 Intermolecular Forces & Physical Properties
Intermolecular Forces & Physical Properties Branching The larger the surface area of a molecule, the more contact it will have with adjacent molecules The surface area of a molecule is?r...
Edexcel A Level Chemistry:复习笔记1.5.3 Hydrogen Bonding
Hydrogen Bonding Interactions Examples of compounds that can form hydrogen bonds are: Alcohols (contains an O-H bond) Ammonia (contains an N-H bond) Amines (contains an N-H bond) Carboxylic ...
Edexcel A Level Chemistry:复习笔记1.5.2 Intermolecular Forces
Intermolecular Forces Intramolecular forces Intramolecular forces?are forces?within?a molecule and are usually covalent bonds Covalent bonds?are formed when the outer electrons of two atoms ...
Edexcel A Level Chemistry:复习笔记1.5.1 Electronegativity
Defining Electronegativity Electronegativity?is the power of an atom to attract the pair of electrons in a covalent bond towards itself The electron distribution in a covalent bond between e...
Edexcel A Level Chemistry:复习笔记1.4.8 Shapes of Covalent Compounds
Electron Pair Repulsion & Shape The?valence shell electron pair repulsion theory?(VSEPR) predicts the shape and bond angles of molecules Electrons are?negatively charged?and will repel o...
Edexcel A Level Chemistry:复习笔记1.4.7 Bond Length & Bond Strength
Bond Length & Bond Strength Bond energy The?bond energy?is the energy required to?break?one mole of a particular covalent bond in the gaseous states Bond energy has units of kJ mol-1 &nb...
