AQA A Level Chemistry復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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?...
