2022年AMC10考试时间已确认，AMC10晋级和获奖难度大吗？
AMC是美国数学思维活动（American Mathematics Competitions）的简称，是一项面向世界中学生的数学思维训练，目前每年全球有超过6000所学校的30万名学生参加该活动，是当今世界上最科学、最权威、最具信誉度的数...
跨学科赛事CTB创新研究大挑战带你解锁全新课题！
CTB 全球创新研究大挑战来啦！关注PBL赛事的家长和同学，CTB这个赛事对大家应该并不陌生。China Thinks Big（简称CTB），由哈佛商学院和清华大学经管学院学者联合启动，是以学术研究和社会实践推动社会创新的国际...
康莱德创新挑战赛中国区决赛力荐，康莱德创新挑战赛报名即将截止！
想被成功录取，学术实力与领导力等申请必备项一个都不能少。想要展现这些特质，参加相关学术活动无疑是不错的选择。恰好全球首个将STEM与商科结合的康莱德创新挑战赛正在火热报名中，感兴趣的同学千万别错过！康...
Edexcel A Level Chemistry:复习笔记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:复习笔记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:复习笔记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:复习笔记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:复习笔记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杜克大学青少年数学大会报名正式开启！
始于2005年，国际名校广泛认可 全美Top10杜克大学支持举办 USMCA全美数学挑战联盟成员之一 杜克大学 青少年大会 DMMC报名后动 强调数学思维，激发兴趣探索 证明数学进阶能力 锻炼快速反应、灵活性及团队协作能力 ...
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...
