Edexcel A Level Chemistry:復習筆記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:復習筆記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:復習筆記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:復習筆記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:復習筆記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...
2023 DMMC杜克大學青少年數學大會報名正式開啟！
始于2005年，國際名校廣泛認可 全美Top10杜克大學支持舉辦 USMCA全美數學挑戰聯盟成員之一 杜克大學 青少年大會 DMMC報名后動 強調數學思維，激發興趣探索 證明數學進階能力 鍛煉快速反應、靈活性及團隊協作能力 ...
Edexcel A Level Chemistry:復習筆記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:復習筆記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:復習筆記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:復習筆記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:復習筆記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:復習筆記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...
