📚 CIE IGCSE Chemistry: Syllabus Overview & Study Strategies | CIE IGCSE 化学：课程大纲与学习方法
Welcome to your comprehensive guide to CIE IGCSE Chemistry (0620). This article breaks down the official syllabus, explains the core topics, and provides proven study strategies to help you achieve an A* in your exams.
欢迎阅读 CIE IGCSE 化学（0620）完整指南。本文将详解官方大纲、核心考点，并为你提供经过验证的学习方法，助你在考试中获得 A* 佳绩。
1. Syllabus Structure & Assessment | 课程结构及评估方式
The CIE IGCSE Chemistry syllabus is designed to give you a solid foundation in chemical principles, practical skills, and scientific thinking. The course is assessed through three written papers and a practical component, depending on your chosen route.
CIE IGCSE 化学课程旨在为你奠定扎实的化学原理、实验技能和科学思维基础。根据你选择的路径不同，该课程通过三份笔试卷和一项实验部分进行评估。
There are two main assessment routes:
该课程有两条主要的评估路线：
- Core & Extended — Most students take the Extended papers (Paper 2 and Paper 4) to access the highest grades A* to E. Core papers (Paper 1 and Paper 3) cover a reduced scope and are graded C to G.
- Core 与 Extended — 大多数学生参加 Extended 试卷（Paper 2 和 Paper 4）以获得 A* 至 E 的最高等级。Core 试卷（Paper 1 和 Paper 3）覆盖的内容范围较小，成绩等级为 C 至 G。
For both routes, you must also complete Paper 5 (Practical Test) or Paper 6 (Alternative to Practical).
无论选择哪条路线，还必须完成 Paper 5（实验考试）或 Paper 6（实验替代卷）。
| Paper | Type 类型 | Duration 时长 | Marks 分值 |
| Paper 2 (Extended) | Multiple Choice 选择题 | 45 min | 40 |
| Paper 4 (Extended) 简答题 | Written Theory 理论卷 | 1h 15min | 80 |
| Paper 5 / 6 实验卷 | Practical / Alt. | 1h 15min | 40 |
2. Core vs Extended Curriculum Content | Core 与 Extended 内容差异
The Extended syllabus includes all Core topics plus additional material marked in the syllabus. These extra topics allow you to develop a deeper understanding and are essential for achieving top grades.
Extended 大纲包含全部 Core 主题，以及大纲中额外标记的内容。这些额外主题帮助你更深入地理解和掌握化学，也是冲击高分的关键。
The main differences lie in:
主要区别体现在：
- Quantitative chemistry — Extended requires calculations involving moles, molar mass, stoichiometry, and gas volumes at room temperature and pressure.
- 定量化学 — Extended 要求学生掌握摩尔、摩尔质量、化学计量学以及室温常压下的气体体积计算。
- Organic chemistry — Extended adds naming and properties of alcohols, acids, esters, and polymers.
- 有机化学 — Extended 增加了醇、酸、酯和聚合物的命名与性质。
- Electrochemistry — Extended includes electrolysis of aqueous solutions with detailed half-equations.
- 电化学 — Extended 包含水溶液电解以及详细的半反应方程式。
Always check your exam syllabus to confirm whether you are taking Core or Extended, as this determines what content you need to revise.
务必查看你的考试大纲，确认你报考的是 Core 还是 Extended，因为这决定了你的复习范围。
3. The Particulate Nature of Matter | 物质的微粒性质
Chemistry begins with the atom. You need to understand the three states of matter — solid, liquid and gas — and explain changes of state in terms of kinetic particle theory.
化学始于原子。你需要理解物质的三种状态——固态、液态和气态，并用动力学微粒理论解释状态变化。
Key ideas include:
关键概念包括：
- Particles are always moving; heating increases their kinetic energy.
- 微粒始终处于运动状态；加热会增加其动能。
- Diffusion is the random movement of particles from an area of high concentration to low concentration.
- 扩散是微粒从高浓度区域向低浓度区域的随机运动。
- Brownian motion provides evidence for the existence of particles.
- 布朗运动为微粒的存在提供了证据。
Kinetic energy ∝ temperature (in Kelvin)
动能 ∝ 温度（开尔文温度）
You should be able to interpret heating and cooling curves, and explain why boiling and melting points are fixed.
你应该能够解读加热和冷却曲线，并解释沸点和熔点为何固定不变。
4. Atomic Structure & The Periodic Table | 原子结构与元素周期表
Atoms consist of protons, neutrons, and electrons. The number of protons defines the element, while isotopes have the same number of protons but different numbers of neutrons.
原子由质子、中子和电子组成。质子数决定了元素种类，而同位素具有相同的质子数但中子数不同。
The table below summarises the three sub-atomic particles:
下表总结了三种亚原子粒子：
| Particle 粒子 | Relative Charge 相对电荷 | Relative Mass 相对质量 |
| Proton 质子 | +1 | 1 |
| Neutron 中子 | 0 | 1 |
| Electron 电子 | −1 | 1/1836 |
Electronic configuration tells you how electrons are arranged in shells
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