Edexcel A Level Chemistry:复习笔记1.4.3 Ionic Trends
Ionic Radius Ionic radius The ionic radius of an element is a measure of the size of an ion Ionic radii show predictable patterns Ionic radii increase with increasing negative charge Ionic r...
Edexcel A Level Chemistry:复习笔记1.4.2 Representing Ionic Bonding
Ionic Dot-and-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 shown as...
Edexcel A Level Chemistry:复习笔记1.4.1 Ionic Bonding Overview
Ionic Bonds As a general rule, metals are on the left of the periodic table and nonmetals are on the right-hand side Ionic bonding involves the transfer of electrons from a metallic element to a no...
Edexcel A Level Chemistry:复习笔记1.3.1 Periodicity
Melting & Boiling Point Trends Elements in the periodic table are arranged in order of increasing atomic number and placed in vertical columns (groups) and horizontal rows (periods) The ...
AP课程 VS NEC，2022NEC全美经济学挑战赛报名中！
NEC全美经济学挑战（National economic challenge）由美国经济教育学会举办的经济学学术活动。它是美国最负盛名、最具影响力的中学生经济学学术活动。AP课程 VS NEC，2022新赛季报名中！ NEC的知识体系与多种主要...
Edexcel A Level Chemistry:复习笔记1.2.4 Electronic Configurations
Electronic Configurations of Atoms & Ions The principal quantum shells increase in energy with increasing principal quantum number E.g. n = 4 is higher in energy than n = 2 The su...
Edexcel A Level Chemistry:复习笔记1.2.3 Orbitals
Orbital Shapes Orbitals Subshells contain one or more atomic orbitals Orbitals exist at specific energy levels and electrons can only be found at these specific levels, not in between them E...
Edexcel A Level Chemistry:复习笔记1.2.2 Quantum Shells
Developing Electronic Configuration Electrons move rapidly around the nucleus in energy shells If their energy is increased, then they can jump to a higher energy level The process is revers...
Edexcel A Level Chemistry:复习笔记1.2.1 Ionisation Energy
Factors Affecting Ionisation Energy Ionisation energy The ionisation Energy (IE) of an element is the amount of energy required to remove one mole of electrons from one mole of gaseous atoms...
