Year 10 OCR Chemistry: Vocabulary Memorization Guide | Year 10 OCR 化学：词汇术语速记指南

📚 Year 10 OCR Chemistry: Vocabulary Memorization Guide | Year 10 OCR 化学：词汇术语速记指南

Mastering the language of chemistry is half the battle for Year 10 students following the OCR specification. This guide breaks down key terms with context-rich explanations and proven memory hacks, transforming abstract jargon into a logical toolkit for exam success. Each section pairs essential vocabulary with dual-language annotations to build both confidence and recall speed.

对于学习 OCR 化学的 Year 10 学生来说，掌握化学语言是成功的一半。本指南将关键术语与丰富的语境解释和经过验证的记忆技巧相结合，把抽象的术语转化为应对考试的实用工具。每个部分都将关键词汇与中英双语注解搭配起来，帮助学生建立信心并提升记忆速度。

1. Atoms and Elements | 原子与元素

The atom is the smallest unit of an element that retains its chemical properties. An element is a pure substance made of only one type of atom, listed on the Periodic Table by atomic (proton) number.

原子是保持元素化学性质的最小单位。元素是仅由一种原子组成的纯净物，在周期表中按原子序数（质子数）排列。

Atomic number (Z) counts the protons in the nucleus. Mass number (A) is the total of protons plus neutrons. Isotopes are atoms of the same element with different numbers of neutrons, hence different mass numbers.

原子序数（Z）等于原子核中的质子数。质量数（A）是质子数与中子数之和。同位素是同一元素中中子数不同、因而质量数也不同的原子。

The relative atomic mass (Aᵣ) is a weighted average of an element's isotopes compared to 1/12 of carbon‑12. For example, chlorine has Aᵣ ≈ 35.5 due to Cl‑35 and Cl‑37 isotopes.

相对原子质量（Aᵣ）是元素同位素相对于碳‑12 的 1/12 的加权平均值。例如，氯的 Aᵣ ≈ 35.5，因为存在 Cl‑35 和 Cl‑37 同位素。

2. Bonding and Structure | 化学键与结构

Ionic bonding involves the transfer of electrons from a metal to a non‑metal, forming oppositely charged ions held together in a giant ionic lattice. The strong electrostatic forces give high melting points.

离子键是金属向非金属转移电子，形成带相反电荷的离子，并排列成巨大的离子晶格。强烈的静电引力使得离子化合物熔点很高。

Covalent bonding is the sharing of electron pairs between non‑metal atoms. Simple molecular substances like H₂O and CO₂ have low melting points, while giant covalent structures (diamond, graphite, SiO₂) have very high melting points due to extensive bonding.

共价键是非金属原子之间共享电子对。像 H₂O 和 CO₂ 这样的简单分子物质熔点较低，而巨型共价结构（金刚石、石墨、SiO₂）由于延展的键合网络，熔点非常高。

Metallic bonding is a lattice of positive metal ions surrounded by a 'sea' of delocalised electrons. This explains electrical conductivity and malleability.

金属键是金属正离子晶格浸没在“自由电子海洋”中。这解释了金属的导电性和延展性。

3. Chemical Reactions and Equations | 化学反应与方程式

The law of conservation of mass states that atoms are neither created nor destroyed in a chemical reaction. This underpins why balanced symbol equations must have the same number of atoms on each side.

质量守恒定律指出，化学反应中原子既不能被创造也不能被毁灭。这就是为什么配平的化学方程式必须两侧原子数目相等。

A word equation uses names: 'magnesium + oxygen → magnesium oxide'. A symbol equation uses formulas: '2Mg + O₂ → 2MgO'. State symbols (s), (l), (g), (aq) show solid, liquid, gas, or aqueous solution.

文字方程式使用名称：“镁 + 氧气 → 氧化镁”。符号方程式使用化学式：“2Mg + O₂ → 2MgO”。状态符号 (s)、(l)、(g)、(aq) 分别表示固体、液体、气体和水溶液。

Exothermic reactions release energy to the surroundings, raising temperature. Endothermic reactions absorb energy, causing a temperature drop. Activation energy is the minimum energy needed to start a reaction.

放热反应向环境释放能量，使温度升高。吸热反应吸收能量，导致温度下降。活化能是启动反应所需的最小能量。

4. Acids, Bases and pH | 酸、碱与 pH

An acid is a substance that releases hydrogen ions (H⁺) in aqueous solution. Common lab acids include hydrochloric acid (HCl), sulfuric acid (H₂SO₄) and nitric acid (HNO₃).

酸是在水溶液中释放氢离子（H⁺）的物质。实验室常见酸有盐酸（HCl）、硫酸（H₂SO₄）和硝酸（HNO₃）。

alis and release hydroxide ions (OH⁻) in water. Neutralisation: H⁺(aq) + OH⁻(aq) → H₂O(l).

碱是能中和酸的物质。可溶的碱称为碱溶液，在水中释放氢氧根离子（OH⁻）。中和反应：H⁺(aq) + OH⁻(aq) → H₂O(l)。

ral, pH > 7 is alkaline. Universal indicator gives a colour change across the whole scale.

pH 值范围从 0 到 14，用于衡量酸碱度。pH < 7 为酸性，pH = 7 为中性，pH > 7 为碱性。通用指示剂在整个范围内呈现颜色变化。

5. Salts and Reactivity | 盐与金属活泼性

acid is replaced by a metal or ammonium. Naming rule: the metal name first, then the acid‑derived part (hydrochloric → chloride, sulfuric → sulfate, nitric → nitrate).

盐是酸中的氢被金属或铵根取代后形成的离子化合物。命名规则：先金属名，再加从酸衍生的部分（盐酸→氯化物，硫酸→硫酸盐，硝酸→硝酸盐）。

etal → salt + hydrogen. With carbonates: acid + carbonate → salt + water + carbon dioxide.

制备可溶性盐：酸与金属、酸与碱、或酸与碳酸盐反应。通用反应：酸 + 金属 → 盐 + 氢气。碳酸盐则产生：酸 + 碳酸盐 → 盐 + 水 + 二氧化碳。

The reactivity series ranks metals by their tendency to form positive ions. A more reactive metal displaces a less reactive metal from its compound. Useful mnemonic: 'Please Stop Calling Me A Zebra, I Think Larry Can Go Slowly' — although OCR does not prescribe one, create your own.

金属活泼性顺序根据金属形成正离子的倾向进行排列。更活泼的金属能从其化合物中置换出较不活泼的金属。有用的记忆口诀可自创，例如根据钾、钠、钙、镁、铝、锌、铁、锡、铅、铜、银、金来编故事。

6. Electrolysis | 电解

Electrolysis is the decomposition of an ionic compound using direct current electricity. The compound must be molten or dissolved so that ions are free to move.

电解是利用直流电分解离子化合物的过程。化合物必须处于熔融或溶解状态，使离子能自由移动。

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The cathode is the negative electrode, which attracts cations (positive ions). Reduction occurs here (gain of electrons). The anode is the positive electrode, attracting anions (negative ions) where oxidation (loss of electrons) takes place. Remember: 'Cations go to Cathode, Anions go to Anode.'

阴极是负极，吸引阳离子（正离子），发生还原反应（得电子）。阳极是正极，吸引阴离子（负离子），发生氧化反应（失电子）。记忆口诀：“阳离子跑向阴极，阴离子跑向阳极”。

In aqueous electrolysis, the products depend on the relative reactivity of the ions and the presence of water. At the cathode, if the metal is more reactive than hydrogen, hydrogen gas is produced; otherwise the metal is deposited. At the anode, a halogen is produced if the solution contains a halide ion; otherwise oxygen is formed from hydroxide ions.

在水溶液电解中，产物取决于离子的相对活泼性及水的存在。在阴极，如果金属比氢更活泼，则生成氢气；否则金属析出。在阳极，如果溶液中有卤离子，则生成卤素；否则由氢氧根离子产生氧气。

7. Quantitative Chemistry | 计算化学

10²³ particles (Avogadro constant). The mass of one mole of a substance is its relative formula mass (Mᵣ) in grams.

摩尔（mol）是物质的量的单位。1 摩尔含有 6.02 × 10²³ 个微粒（阿伏伽德罗常数）。1 摩尔物质的质量等于其相对公式质量（Mᵣ）以克为单位。

n × volume (in dm³). A 1 dm³ solution containing 1 mole of solute is a 1 mol/dm³ solution.

浓度以 mol/dm³ 或 g/dm³ 为单位。关键公式：物质的量 = 浓度 × 体积（dm³）。若 1 dm³ 溶液含 1 mol 溶质，则浓度为 1 mol/dm³。

Percentage yield compares actual yield to theoretical yield: (actual / theoretical) × 100% es the efficiency of a reaction: (Mᵣ of desired product / sum of Mᵣ of all products) × 100%. High atom economy is desirable for sustainability.

产率百分比是实际产量与理论产量的比值：（实际产量 / 理论产量）× 100%。原子经济性衡量反应效率：（目标产物的 Mᵣ / 所有产物 Mᵣ 之和）× 100%。高原子经济性有利于可持续发展。

8. Organic Chemistry Intro | 有机化学入门

Crude oil is a mixture of hydrocarbons, mainly alkanes. Hydrocarbons are compounds containing only hydrogen and carbon. Alkanes have the general formula CₙH₂ₙ₊₂ and are saturated (single bonds only: C–C).

原油是烃类（主要是烷烃）的混合物。烃是只含碳和氢的化合物。烷烃通式为 CₙH₂ₙ₊₂，属于饱和烃（只有碳碳单键）。

Fractional distillation separates crude oil into fractions based on boiling points. Longer chains have stronger intermolecular forces, so higher boiling points. Fractions include refinery gases, petrol, kerosene, diesel, fuel oil and bitumen.

分馏根据沸点不同将原油分离为不同的馏分。分子链越长，分子间作用力越强，沸点越高。馏分包括炼厂气、汽油、煤油、柴油、燃料油和沥青。

ng a C=C double bond, which makes them more reactive and useful as feedstock for polymers.

裂化将较长、用途较小的烷烃转化为较短的烷烃和烯烃。烯烃（CₙH₂ₙ）是不饱和烃，含有 C=C 双键，因此更活泼，是制造聚合物的原料。

9. Groups in the Periodic Table | 周期表族元素

Group 1: Alkali metals (Li, Na, K, Rb, Cs) are soft, highly reactive metals. Reactivity increases down the group because the outer electron is farther from the nucleus and more easily lost. They form ionic compounds with non‑metals and react vigorously with water to produce a metal hydroxide and hydrogen.

第 1 族：碱金属（Li, Na, K, Rb, Cs）是质地软、高度活泼的金属。活泼性从上到下增强，因为外层电子离原子核更远，更容易失去。它们与非金属形成离子化合物，与水剧烈反应生成金属氢氧化物和氢气。

Group 7: Halogens (F, Cl, Br, I) exist as diatomic molecules. Reactivity decreases down the group because the outer shell is farther from the nucleus, making it harder to gain an electron. A more reactive halogen can displace a less reactive halide from its salt solution.

第 7 族：卤素（F, Cl, Br, I）以双原子分子存在。活泼性从上到下减弱，因为外层电子离核越来越远，更难获得电子。更活泼的卤素能将较不活泼的卤素从其盐溶液中置换出来。

Group 0: Noble gases are monatomic, colourless, and very unreactive due to a full outer shell of electrons. They are used in lighting (neon signs) and as inert atmospheres (argon in welding).

第 0 族：稀有气体是单原子的、无色的，由于最外层电子已满，非常不活泼。它们用于照明（霓虹灯）和作保护气氛（焊接中的氩气）。

10. Terminology Memory Strategies | 术语记忆策略

Break terms into word roots: 'electro‑' refers to electricity, '‑lysis' means splitting, so electrolysis is splitting with electricity. 'Cation' = cathode + ion, a positive ion going to the cathode. 'Anion' = anode + ion, a negative ion going to the anode.

将术语拆分为词根：“electro‑” 指电，“‑lysis” 指分解，所以电解就是用电分解。“Cation” = cathode + ion，即趋向阴极的正离子。“Anion” = anode + ion，即趋向阳极的负离子。

Create visual analogies: imagine an ionic lattice as a 3D grid of alternating positive and negative marbles glued by electrostatic glue. For metallic bonding, picture positive ions floating in a pool of electrons. For the reactivity series, build a story where each metal 'bullies' the one below it out of the compound.

建立视觉类比：将离子晶格想象为 3D 网格，正负弹珠交替排列，由静电力胶水粘合。金属键则可想象为正离子漂浮在电子池中。对于金属活泼性顺序，可以编一个故事，让每个金属“欺负”排在它下面的金属，将其从化合物中赶出去。

Chinese translation, a simple diagram, and a sentence showing it in context. For example, 'neutralisation' — canceling out, with the equation H⁺ + OH⁻ → H₂O. Regular spaced repetition solidifies long‑term memory.

使用双编码抽认卡：一面写术语，另一面写中文翻译、简单示意图和包含该术语的语境句子。比如“中和反应”——画一个酸和一个碱相互抵消，旁边写上 H⁺ + OH⁻ → H₂O。定期间隔重复能巩固长期记忆。

Published by TutorHao | Chemistry Revision Series | aleveler.com

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