AQA A Level Chemistry复习笔记1.5.2 Bond Polarity
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 elements w...
AQA A Level Chemistry复习笔记1.4.10 Effects of Structure & Bonding
Effects of Bonding & Structure on Physical Properties Different types of structure and bonding have different effects on the physical properties of substances such as their melting and b...
AQA A Level Chemistry复习笔记1.4.9 Properties of Metallic Substances
Metallic Lattice Structures Metals form giant metallic lattices in which the metal ions are surrounded by a ‘sea’ of delocalised electrons The metal ions are often packed in hexagonal layers...
AQA A Level Chemistry复习笔记1.4.8 Properties of Covalent Substances
Covalent Lattice Structures Covalent lattices Covalent bonds are bonds between nonmetals in which electrons are shared between the atoms Covalent compounds can be arranged in simple molecula...
AQA A Level Chemistry复习笔记1.4.7 Properties of Ionic Compounds
Ionic Lattice Structures Most ionic, metallic and covalent solids are crystalline lattices The ions, atoms or molecules are arranged in a regular and repeating arrangement Giant ionic lattic...
AQA A Level Chemistry复习笔记1.4.6 Metallic Bonding
Metallic Bonding: Definition 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 mov...
AQA A Level Chemistry复习笔记1.4.5 Dot & Cross Diagrams
Representing Dot & Cross Diagrams Dot and cross diagrams are diagrams that show the arrangement of the outer-shell electrons in an ionic or covalent compound or element The electrons are...
AQA A Level Chemistry复习笔记1.4.4 Dative Covalent Bonding
Dative Covalent Bonding In simple covalent bonds, the two atoms involved share electrons Some molecules have a lone pair of electrons that can be donated to form a bond with an electron-defi...
AQA A Level Chemistry复习笔记1.4.3 Covalent Bonding
Covalent Bonding Covalent bonding occurs between two non-metals A covalent bond involves the electrostatic attraction between nuclei of two atoms and the bonding electrons of their outer shells No ...
