AS AQA Chemistry Paper 1: Complete Revision Guide | AQA AS 化学试卷一：完整复习指南

📚 AS AQA Chemistry Paper 1: Complete Revision Guide | AQA AS 化学试卷一：完整复习指南

This revision guide is designed specifically for the AQA AS Chemistry Paper 1 (7404/1), aligned with the International May 2023 examination series (CH01 QP, 10 May 2023, 07:00 GMT). Every specification topic is covered with exam-focused explanations, worked examples, and common pitfalls to avoid under timed conditions.

本复习指南专为 AQA AS 化学试卷一（7404/1）编写，对应 2023 年 5 月国际考试系列（CH01 试卷，2023 年 5 月 10 日格林尼治时间 07:00）。考纲各主题均配有考试导向的讲解、例题解析与限时作答时的常见失分点提醒。

1. Exam Overview | 考试概览

Paper 1 is 1 hour 30 minutes long and carries 80 marks, contributing 50% of your AS grade. It consists of 65 marks of short-answer and extended-response questions, followed by 15 marks of multiple-choice questions covering inorganic and physical chemistry, including practical techniques.

试卷一考试时长为 1 小时 30 分钟，满分 80 分，占 AS 总成绩的 50%。试卷包含 65 分简答题与扩展论述题，以及 15 分选择题，涵盖无机化学、物理化学及实验技术。

The specification topics are: atomic structure, amount of substance, bonding, energetics, kinetics, equilibria, redox reactions, periodicity, Group 2, and Group 7. Mastering all ten areas is essential for a high grade.

考纲主题包括：原子结构、物质的量、化学键、能量学、动力学、化学平衡、氧化还原反应、元素周期性、第二主族与第七主族。熟练掌握全部十个模块是取得高分的关键。

2. Atomic Structure & Isotopes | 原子结构与同位素

The atom consists of a nucleus containing protons and neutrons, surrounded by electrons in shells and sub-shells. The mass number (A) equals protons plus neutrons, while the atomic number (Z) equals protons only. Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons.

原子由含质子和中子的原子核以及围绕核运动的电子组成。质量数（A）等于质子数加中子数，原子序数（Z）等于质子

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