Edexcel A Level Chemistry:复习笔记1.5.8 Predicting Structures
Predicting Structure & Bonding Different types of structure and bonding have different effects on the physical properties of substances such as their melting and boiling points, electric...
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...
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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...
Edexcel A Level Chemistry:复习笔记1.4.6 Covalent Dot-and-Cross Diagrams
Covalent Dot-and-Cross Diagrams Covalent compounds The atoms in covalent compounds will share their outer valence electrons to achieve a noble gas configuration Dot-and-cross diagrams of cov...
