8月A-Level大考成绩放榜，成绩公布时间和查分攻略请收好！
此前由于疫情原因，各个国际大考相继出现考试形式的更改问题，其中个别地区的A-Level大考就因此转换为POE或TAG形式，许多同学不免担忧评估出分会导致高分通胀情况。 同学们的担忧是否会成为既定事实？相信随着今...
CIE A Level Chemistry复习笔记1.3.15 Inter & Intramolecular Forces
Comparing Bonds to Intermolecular Forces Intramolecular forces Intramolecular forces are forces within a molecule Ionic bonding is the electrostatic attraction between positive (cations) and negati...
CIE A Level Chemistry复习笔记1.3.14 Van der Waals' Forces
van der Waals' Forces & Dipoles Covalent bonds are strong intramolecular forces Molecules also contain weaker intermolecular forces which are forces between molecules These intermolecular force...
CIE A Level Chemistry复习笔记1.3.13 Polarity & Dipole Moments
Polarity & Dipole Moments Electronegativity is the ability of an atom to draw a pair of electrons towards itself in a covalent bond Electronegativity increases across a Period and decreases goi...
CIE A Level Chemistry复习笔记1.3.12 Hydrogen Bonding
Hydrogen Bonding Hydrogen bonding Hydrogen bonding is the strongest form of intermolecular bonding Intermolecular bonds are bonds between molecules Hydrogen bonding is a type of permanent dipole – ...
CIE A Level Chemistry复习笔记1.3.10 Bond Energy & Length
Covalent Bonding: Bond Energy & Length 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...
CIE A Level Chemistry复习笔记1.3.9 Hybridisation
Covalent Bonding: Orbitals & Hybridisation Bond overlap in covalent bonds A single covalent bond is formed when two nonmetals combine Each atom that combines has an atomic orbital containing a ...
CIE A Level Chemistry复习笔记1.3.8 Coordinate Bonding
Dative Bonding: Definition & Examples In simple covalent bonds the two atoms involved shares electrons Some molecules have a lone pair of electrons that can be donated to form a bond with an el...
CIE A Level Chemistry复习笔记1.3.7 Covalent Bonding
Covalent Bonding: Definition & Examples Covalent bonding occurs between two nonmetals A covalent bond involves the electrostatic attraction between nuclei of two atoms and the bonding electrons...
