📚 Mastering Key Vocabulary in Year 10 OCR Chemistry | Year 10 OCR 化学：词汇术语速记指南
Welcome to your essential guide for tackling the demanding terminology of Year 10 OCR Chemistry. This resource is designed to help you memorise and truly understand the key words that form the foundation of your GCSE studies. Rather than just a list of definitions, we will explore clever memory tricks, word origins, and context for each term, ensuring you can use them confidently in exams.
欢迎来到这份 Year 10 OCR 化学核心术语速记指南。本资源旨在帮助你记忆并真正理解构成 GCSE 学习基础的关键词汇。我们不仅提供定义列表，还会探索巧妙的记忆技巧、词源以及每个术语的上下文，确保你能在考试中自信地使用它们。
1. Atomic Structure Essentials | 原子结构基础
The atom is the smallest part of an element that can still be recognised as that element. It consists of a nucleus containing protons and neutrons, surrounded by electrons in shells. Remember: Protons are Positive, Neutrons are Neutral, Electrons are negative. The atomic number tells you the number of protons (and electrons in a neutral atom), while the mass number is the total of protons plus neutrons.
原子是能保持元素化学性质的最小粒子。它由一个包含质子和中子的原子核以及核外分层排布的电子组成。记法：质子带正电，中子不带电，电子带负电。原子序数告诉你质子数（以及中性原子中的电子数），质量数则是质子数加中子数的总和。
- Proton / 质子: Subatomic particle with relative charge +1 and relative mass 1. Memory aid: 'Pro' sounds like 'positive'.
- Neutron / 中子: Subatomic particle with charge 0 and relative mass 1. Neutron rhymes with 'neutral'.
- Electron / 电子: Subatomic particle with charge –1 and negligible mass. 'Electr-' relates to electricity, which involves moving electrons.
- Nucleus / 原子核: The tiny, dense central part of an atom. Think 'nucleus' like the 'core' of an apple, but much smaller.
- Atomic number / 原子序数: The number of protons, unique to each element. Symbol Z.
- Mass number / 质量数: The total number of protons and neutrons. Symbol A.
2. The Periodic Table Layout | 元素周期表结构
The periodic table is arranged in order of increasing atomic number. Vertical columns are called groups; elements in the same group have similar chemical properties because they have the same number of outer shell electrons. Horizontal rows are periods. Metals are on the left, non-metals on the right. Group 1 are the alkali metals, Group 7 the halogens, Group 0/8 the noble gases.
元素周期表按原子序数递增顺序排列。纵列称为族；同一族元素具有相似的化学性质，因为它们最外层电子数相同。横排称为周期。左边是金属，右边是非金属。第1族是碱金属，第7族是卤素，第0/8族是稀有气体。
- Group / 族: A vertical column. Mnemonic: 'Groups go up and down, periods go across.'
- Period / 周期: A horizontal row. Each period starts with an electron in a new shell.
- Alkali metals / 碱金属: Soft, reactive metals in Group 1. 'Alkali' because they form alkaline solutions when they react with water.
- Halogens / 卤素: Reactive non-metals in Group 7. 'Halo-' means salt; they form salts with metals.
- Noble gases / 稀有气体: Inert, monatomic gases in Group 0/8. 'Noble' because they don't react easily – they are 'aloof'.
3. Chemical Bonding Basics | 化学键入门
Bonding involves the joining of atoms to achieve more stable electronic structures, usually a full outer shell like a noble gas. There are three main types you need to know for Year 10: ionic bonding (transfer of electrons between metal and non-metal), covalent bonding (sharing of electrons between non-metals), and metallic bonding (sea of delocalised electrons around positive metal ions).
化学键是原子之间通过结合以达到更稳定电子结构（通常是类似稀有气体的全满最外层）的过程。Year 10 需要掌握三种主要类型：离子键（金属与非金属之间电子转移）、共价键（非金属之间电子共享）和金属键（正金属离子周围的离域电子海）。
- Ionic bond / 离子键: Electrostatic attraction between oppositely charged ions. Think 'I own an electron' – one atom gives, the other takes.
- Covalent bond / 共价键: Shared pair of electrons. 'Co-' means together, 'valent' relates to valence electrons.
- Metallic bond / 金属键: Attraction between positive metal ions and delocalised electrons. Imagine a lattice of cations in a 'sea' of electrons.
- Ion / 离子: A charged particle formed when an atom gains or loses electrons. Cation (+), Anion (–). Remember: CATions are PAWsitive, ANions are Negative.
4. Formula Writing and Naming Compounds | 化学式书写与化合物命名
Writing correct formulas requires knowing the charges on ions. For ionic compounds, the total positive charge must balance the total negative charge. The name usually comes from the metal first, then the non-metal ending in '-ide' (e.g., sodium chloride). For compounds containing oxygen, '-ate' is used (e.g., copper sulfate). Prefixes like mono-, di-, tri- are used for covalent compounds (carbon dioxide, CO₂).
书写正确的化学式需要知道离子的电荷。对于离子化合物，正负总电荷必须平衡。命名通常先金属后非金属，非金属以“-ide”结尾（如 sodium chloride 氯化钠）。含氧的化合物用“-ate”（如 copper sulfate 硫酸铜）。共价化合物则使用 mono-, di-, tri- 等前缀（如 carbon dioxide 二氧化碳）。
- Empirical formula / 实验式: Simplest whole number ratio of atoms in a compound. 'Empirical' means by experiment.
- Molecular formula / 分子式: Actual number of atoms of each element in a molecule.
- Valency / 化合价: The combining power of an atom. Group 1 has valency 1, Group 2 has 2, etc.
- Polyatomic ion / 多原子离子: Ions made of more than one atom, e.g., SO₄²⁻ (sulfate), NO₃⁻ (nitrate). Know their formulas and charges.
5. Chemical Equations and Reactions | 化学方程式与反应
A word equation shows the names of reactants and products. A symbol equation uses formulas and must be balanced so that the number of atoms of each element is the same on both sides. State symbols (s), (l), (g), (aq) are vital in OCR exams. Aqueous (aq) means dissolved in water. Always check for diatomic molecules: H₂, N₂, O₂, F₂, Cl₂, Br₂, I₂.
文字方程式给出反应物和生成物的名称。符号方程式使用化学式，并且必须配平，使反应前后每种元素的原子数目相等。状态符号 (s)、(l)、(g)、(aq) 在 OCR 考试中至关重要。aq 表示水溶液。始终留意双原子分子：H₂、N₂、O₂、F₂、Cl₂、Br₂、I₂。
- Reactant / 反应物: Substance we start with. 'React' + 'ant'.
- Product / 生成物: Substance made in the reaction. Think 'produce'.
- Balanced equation / 配平方程式: Equation with equal numbers of each type of atom on both sides.
- State symbols / 状态符号: (s) solid, (l) liquid, (g) gas, (aq) aqueous. Never forget them in a chemical equation unless told otherwise.
6. Separating Mixtures | 混合物分离
A mixture contains two or more elements or compounds not chemically combined. We can separate them by physical techniques. Filtration separates an insoluble solid from a liquid. Crystallisation obtains a soluble solid from a solution by evaporating the solvent. Simple distillation separates a liquid from a dissolved solid. Fractional distillation separates liquids with different boiling points. Chromatography separates substances based on their solubility in a solvent.
混合物是由两种或以上未发生化学结合的元素或化合物组成。我们可以通过物理方法将其分离。过滤用于分离不溶性固体和液体。结晶通过蒸发溶剂从溶液中获得可溶性固体。简单蒸馏分离液体和溶解的固体。分馏用于分离沸点不同的液体。色谱法基于物质在溶剂中的溶解度差异进行分离。
- Filtrate / 滤液: The liquid that passes through the filter paper.
- Residue / 滤渣: The solid left on the filter paper.
- Distillate / 馏出液: The liquid collected after condensation during distillation.
- Rₓ value / 比移值: In chromatography, ratio of distance moved by substance to distance moved by solvent front.
7. Acids, Bases and Salts | 酸、碱和盐
base that produces hydroxide ions (OH⁻). The pH scale measures the acidity or alkalinity. Neutralisation: acid + base → salt + water. Key reactions to remember: acid + metal → salt + hydrogen; acid + carbonate → salt + water + carbon dioxide.
酸是在水溶液中产生氢离子（H⁺）的物质。碱是能中和酸的物质，可溶性碱称为 alkali，产生氢氧根离子（OH⁻）。pH 标度衡量酸碱度。中和反应：酸 + 碱 → 盐 + 水。需要记住的关键反应：酸 + 金属 → 盐 + 氢气；酸 + 碳酸盐 → 盐 + 水 + 二氧化碳。
- Indicator / 指示剂: A substance that changes colour with pH, e.g., litmus, phenolphthalein, methyl orange.
- Salt / 盐: Compound formed when the hydrogen in an acid is replaced by a metal or ammonium ion.
- Neutralisation / 中和: The reaction between H⁺ and OH⁻ to form water. H⁺(aq) + OH⁻(aq) → H₂O(l).
- Concentrated vs. Dilute / 浓与稀: Concentrated means lots of solute per volume; dilute means little solute. Not to be confused with strong/weak.
8. Reactivity and Extraction of Metals | 金属活泼性与冶炼
The reactivity series lists metals in order of their reactivity. A more reactive metal can displace a less reactive metal from its compound. Carbon can displace metals below it in the series, which is used in extraction. Metals above carbon are extracted by electrolysis. Key terms: oxidation is loss of electrons (or gain of oxygen), reduction is gain of electrons (or loss of oxygen) – remember OIL RIG: Oxidation Is Loss, Reduction Is Gain.
金属活泼性顺序表是按金属活泼性排列的。较为活泼的金属可以从化合物中置换出较不活泼的金属。碳可以置换出排在它后面的金属，这就是冶炼原理。比碳活泼的金属通过电解法冶炼。关键术语：氧化是失去电子（或得氧），还原是得到电子（或失氧）——记住 OIL RIG（氧化失电子，还得电子）。
- Displacement reaction / 置换反应: A reaction where a more reactive element takes the place of a less reactive one in a compound.
- Electrolysis / 电解: Splitting up a compound using electricity. 'Electro-' (electricity) + 'lysis' (splitting).
- Ore / 矿石: Rock containing enough metal compound to be economically extracted.
- Oxidising agent / 氧化剂: A substance that oxidises another substance while itself being reduced.
9. Energy Changes in Reactions | 反应中的能量变化
Exothermic reactions transfer thermal energy to the surroundings, causing a temperature rise (e.g., combustion, neutralisation). Endothermic reactions take in thermal energy from the surroundings, causing a temperature drop (e.g., thermal decomposition). The activation energy is the minimum energy needed for a reaction to occur. Bond breaking is endothermic, bond making is exothermic.
放热反应向环境释放热能，导致温度升高（如燃烧、中和反应）。吸热反应从环境吸收热能，导致温度下降（如热分解）。活化能是发生反应所需的最低能量。断键吸热，成键放热。
- Exothermic / 放热: 'Exo-' means out, 'thermic' relates to heat. Energy exits.
- Endothermic / 吸热: 'Endo-' means within. Heat goes in.
- Activation energy / 活化能: The energy barrier. Symbol Eₐ. Think of it as the 'push' needed to start.
- Reaction profile / 反应过程图: Diagram showing energy changes during a reaction, with reactants, products, and activation energy.
10. Rate of Reaction and Collision Theory | 反应速率与碰撞理论
The rate of reaction tells us how fast reactants are converted into products. Collision theory states that particles must collide with sufficient energy (activation energy) and correct orientation for a reaction to happen. Factors affecting rate: concentration, pressure (for gases), surface area, temperature, and catalysts. A catalyst increases the rate by providing an alternative pathway with lower activation energy, without being used up.
反应速率表示反应物转化成生成物的快慢。碰撞理论指出，粒子必须以足够的能量（活化能）和正确的取向碰撞才能发生反应。影响速率的因素：浓度、压强（针对气体）、表面积、温度和催化剂。催化剂通过提供活化能较低的替代路径来提高速率，而自身不被消耗。
- Rate / 速率: Change in amount of reactant or product per unit time. Often measured in g/s or cm³/s.
- Collision frequency / 碰撞频率: Number of collisions per second. Higher frequency often means faster rate.
- Catalyst / 催化剂: A substance that speeds up a reaction but remains chemically unchanged. 'Cata-' means down, 'lyst' relates to loosening – lowering the barrier.
- Surface area / 表面积: Solids with larger surface area have more particles exposed, increasing collision frequency.
11. Chemical Analysis and Common Tests | 化学分析与常用测试
You must be able to recall tests for common gases, anions, and cations. The test for hydrogen is a squeaky pop with a lit splint. Oxygen relights a glowing splint. Carbon dioxide turns limewater milky. Chlorine bleaches damp litmus paper. Flame tests identify metal ions (Li⁺ crimson, Na⁺ yellow, K⁺ lilac, Ca²⁺ brick red, Cu²⁺ green). Precipitation tests use sodium hydroxide to form coloured hydroxides.
你必须记住常见气体、阴离子和阳离子的测试方法。氢气检验：燃着的木条靠近，发出爆鸣声。氧气使带火星的木条复燃。二氧化碳通入澄清石灰水变浑浊。氯气使湿润的石蕊试纸褪色。焰色反应鉴别金属离子（Li⁺ 深红色，Na⁺ 黄色，K⁺ 淡紫色，Ca²⁺ 砖红色，Cu²⁺ 绿色）。沉淀法使用氢氧化钠生成不同颜色的氢氧化物沉淀。
- Limewater / 石灰水: Calcium hydroxide solution, used to test for CO₂. Turns cloudy/milky.
- Squeaky pop / 爆鸣声: Sound of hydrogen igniting with oxygen in air.
- Flame test / 焰色反应: Method to identify metal ions by the colour they give to a Bunsen flame.
- Precipitate / 沉淀: Solid formed when two solutions are mixed.
12. Quantitative Chemistry Terminology | 定量化学术语
ole is the unit for amount of substance. One mole contains 6.02 × 10²³ particles (Avogadro' the sum of Aᵣ values in a formula. Percentage yield compares actual to theoretical yield.
尽管大部分计算内容在 Year 11 学习，但 Year 10 引入了核心词汇。摩尔是物质的量的单位。一摩尔含有 6.02 × 10²³ 个粒子（阿伏伽德罗常数）。相对原子质量（Aᵣ）是原子平均质量与碳-12 原子质量的 1/12 比较。相对公式质量（Mᵣ）是化学式中各原子相对原子质量之和。产率百分比比较实际产量与理论产量。
- Mole / 摩尔: Avogadro's number of particles. Think 'mole' like a mole of popcorn, but with 6.02 × 10²³ pieces.
- Avogadro's constant / 阿伏伽德罗常数: Nₐ = 6.02 × 10²³ mol⁻¹. The number of particles in one mole.
- Concentration / 浓度: Amount of solute per unit volume, often g/dm³ or mol/dm³.
- Yield / 产率: The mass of product obtained. Theoretical yield is the maximum predicted; actual yield is what you get in practice.
Published by TutorHao | Chemistry Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
或截图后用「扫一扫 → 相册」选择本图