2022年IBDP课程考试分析，香港考生脱颖而出！
就IBDP课程考试来说，中国香港和新加坡的IB学生绝对是中国大陆学生的强有力竞争对手！ 平均成绩高，45分满分获得者众多，IBDP课程认可度高，所有这些都让中国香港的IB学生能够在全球的IBDP大考中脱颖而出。 2022...
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...
Edexcel A Level Chemistry:复习笔记1.4.5 Covalent Bonding Overview
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 she...
Edexcel A Level Chemistry:复习笔记1.4.4 Physical Properties of Ionic Compounds
Physical Properties of Ionic Compounds Most ionic, metallic and covalent solids are crystalline lattices The ions, atoms or molecules are arranged in a regular and repeating arrangement Gian...
