📚 Year 11 CIE Chemistry: Rapid Vocabulary & Terminology Guide | Year 11 CIE 化学：词汇术语速记指南
Mastering technical vocabulary is half the battle in Cambridge IGCSE Chemistry (0620). This guide curates the most frequently examined terms across the syllabus, pairing each with a simple definition and a memory hack that links the word to its meaning. Use it to accelerate your revision and boost your confidence in Paper 1, Paper 3, Paper 5 and the practical papers.
掌握专业词汇是攻克剑桥 IGCSE 化学 (0620) 的半壁江山。本指南精选了考纲中最常出现的术语，每个术语都配有简洁的定义和一个将单词与其含义联系起来的速记窍门。用它来加速复习，并在选择题、理论题、实验题和实操卷中提升答题信心。
1. Atomic Structure & Particles | 原子结构与粒子
The language of atoms underpins all of chemistry. Confusing 'atomic number' with 'mass number' is a classic exam slip. Cement the difference now with a simple story- based shortcut: think of the proton as the identity card, the neutron as the heavy lifter, and the electron as the busy courier.
原子的语言是全部化学的基础。混淆'原子序数'和'质量数'是考场上典型的失误。现在就用一个简单的故事化窍门来加固它们：把质子看作身份证，中子看作大力士，电子看作忙碌的快递员。
Proton — A positively charged subatomic particle found in the nucleus; its number defines the element. Memory tip: 'Pro' means 'first' – you identify the element by counting protons first.
质子 — 原子核中带正电的亚原子粒子；它的数目决定了元素的种类。速记：'Pro' 表示'第一'——识别元素首先要数质子。
Neutron — A neutral particle in the nucleus that contributes mass but not charge. Memory tip: 'Neutron' sounds like 'neutral' – no charge, just mass.
中子 — 原子核中不带电的粒子，贡献质量但不带电荷。速记：'Neutron' 读音像'neutral'——零电荷，只出质量。
Electron — A negatively charged particle that orbits the nucleus in shells. Memory tip: 'Electron' and 'electricity' share the same root – electrons move to create current.
电子 — 带负电的粒子，分层绕核运动。速记：'Electron' 与 'electricity' 同根——电子移动产生电流。
Isotope — Atoms of the same element with different numbers of neutrons, hence different mass numbers. Memory tip: 'Iso' = same, 'tope' = place – they occupy the same place on the periodic table.
同位素 — 质子数相同但中子数不同的同种原子，因此质量数不同。速记：'Iso' = 相同，'tope' = 位置——它们在周期表中占据同一位置。
Relative atomic mass (Aᵣ) — The weighted average mass of an element's isotopes compared to 1/12 of carbon-12. Memory tip: 'Aᵣ' like 'average relative' – always a decimal average on the periodic table.
相对原子质量 (Aᵣ) — 元素同位素质量的加权平均值，以碳-12 的 1/12 为基准。速记：'Aᵣ' 可联想为 'average relative'——周期表上总是带小数的平均值。
2. Chemical Bonding | 化学键
Bonding terms often appear in 'explain' questions. Visualising the difference between ionic, covalent and metallic bonding as a transfer, a sharing and a sea of electrons respectively can save you valuable marks when drawing dot-and-cross diagrams.
化学键的术语常出现在'解释'类题目中。将离子键、共价键和金属键分别想象为电子的'传递'、'共享'和'电子海洋'，可以在你绘制点叉图时保住宝贵的分数。
Ionic bond — The strong electrostatic attraction between oppositely charged ions, formed when a metal transfers electrons to a non-metal. Memory tip: 'I give' electrons → 'I-onic' – one atom gives, the other takes.
离子键 — 带相反电荷离子之间的强静电引力，由金属将电子转移给非金属而形成。速记：'I give' 电子 → 'I-onic'——一个给，一个拿。
Covalent bond — A bond formed by sharing a pair of electrons between two non-metal atoms. Memory tip: 'Co-' means together, 'valent' relates to valence electrons – together they share.
共价键 — 两个非金属原子间通过共用一对电子形成的键。速记：'Co-' 意为共同，'valent' 指向价电子——共同分享。
Metallic bond — The attraction between a lattice of positive metal ions and a 'sea' of delocalised electrons. Memory tip: Picture a metal as 'metal licks' – the sea of electrons 'licks' the positive ions together.
金属键 — 金属阳离子晶格与离域电子'海洋'之间的吸引力。速记：想象金属如 'metal licks'——电子海洋把阳离子'舔'在一起。
Giant covalent structure — A vast network of atoms linked by covalent bonds, e.g. diamond, graphite, silicon dioxide. Memory tip: 'Giant' because it goes on and on – there are no small molecules, just one endless structure.
巨型共价结构 — 由共价键连接起来的庞大原子网络，如金刚石、石墨、二氧化硅。速记：'巨型'是因为它无穷无尽——没有小分子，只有一个无限延伸的结构。
Alloy — A mixture of a metal with other elements, usually harder than the pure metal because the different-sized atoms disrupt the layers. Memory tip: 'Alloy' = 'all loy' (loyal mix) – adding another element makes it stronger through disorder.
合金 — 金属与其他元素组成的混合物，通常比纯金属更硬，因为大小不同的原子扰乱了层间滑动。速记：'Alloy' = 'all loyal'——加入别的元素，用'混乱'增强强度。
3. Stoichiometry & Formulae | 化学计量与化学式
Stoichiometry can be intimidating, but its terminology is logical. The mole is simply a counting unit, and words like 'empirical' and 'molecular' describe different levels of information about a compound. Lock these in and you'll find the calculations much friendlier.
化学计量可能令人畏惧，但其术语自有逻辑。摩尔不过是一个计数单位，而'经验式'和'分子式'等词语描述的是一种化合物的不同信息层次。牢牢掌握它们，你会觉得计算题友善得多。
Mole — The amount of substance containing 6.02 × 10²³ particles (Avogadro's constant). Memory tip: A mole of marbles would cover the Earth – it's a convenient chemist's 'dozen' for counting atoms.
摩尔 — 包含 6.02 × 10²³ 个粒子（阿伏伽德罗常数）的物质的量。速记：一摩尔的弹珠足以覆盖地球——它是化学家计数原子的'打'。
Empirical formula — The simplest whole-number ratio of atoms in a compound. Memory tip: 'Empirical' like 'simple trial' – you find it by experiment, reducing to the simplest ratio.
经验式 — 化合物中原子最简整数比的化学式。速记：'Empirical' 像 'simple trial'——通过实验得出并化简的最简比。
Molecular formula — The actual number of atoms of each element in a molecule. Memory tip: 'Molecular' = 'more complete' – it tells you the true count, not just the ratio.
分子式 — 一个分子中每种元素原子的实际数目。速记：'Molecular' = 'more complete'——给出真实数量，而不只是比例。
Limiting reactant — The reactant that is completely used up during a reaction, determining the amount of product formed. Memory tip: It 'limits' your yield – once it runs out, the party stops.
限量反应物 — 反应中完全消耗的反应物，它决定了生成物的产量。速记：它'限制'了你的产量——一旦用光，反应就戛然而止。
Percentage yield — (actual mass of product / theoretical mass) × 100%. Memory tip: You never get 100% in real life – some product always sticks to the beaker.
产率 — (实际产品质量 / 理论产品质量) × 100%。速记：现实生活中你永远达不到 100%——总有些产物会粘在烧杯壁上。
4. Acids, Bases & Salts | 酸、碱与盐
The acid-base lexicon is packed with words that describe proton movements. Whether you use the Arrhenius or Bronsted-Lowry definition, imagining H⁺ as a ping-pong ball being passed around brings the concepts alive.
酸碱词汇里充满了描述质子运动的词。无论你使用阿伦尼乌斯定义还是布朗斯特-劳里定义，把 H⁺ 想象成一颗被传来传去的乒乓球，就能让这些概念鲜活起来。
Acid — A substance that releases H⁺ ions in aqueous solution (or is a proton donor). Memory tip: 'A-cid' sounds like 'a seed' – it 'releases' H⁺ seeds into water.
酸 — 在水溶液中释放 H⁺ 离子（或作为质子供体）的物质。速记：'A-cid' 音似 'a seed'——它向水中播撒 H⁺ 种子。
Base — A substance that neutralises an acid, often a metal oxide or hydroxide; a proton acceptor. Memory tip: 'Base' is the foundation – it 'accepts' the acid's proton and settles things down.
碱 — 能中和酸的物质，通常是金属氧化物或氢氧化物；是质子受体。速记：'Base' 像底座——它'接受'酸的质子，让一切平静下来。
Alkali — A soluble base that releases OH⁻ ions in water. Memory tip: 'Alkali' gives an 'alkaline' feel – think of it as a 'base that can swim' (soluble).
碱（可溶） — 在水中释放 OH⁻ 离子的可溶性碱。速记：'Alkali' 带来'alkaline'的触感——把它想成'会游泳的碱'（可溶）。
Neutralisation — The reaction between an acid and a base to form a salt and water. Memory tip: H⁺ + OH⁻ → H₂O – the proton marries the hydroxide; salt is the wedding gift.
中和反应 — 酸与碱反应生成盐和水的过程。速记：H⁺ + OH⁻ → H₂O——质子与氢氧根'成婚'，盐是随礼。
Titration — A technique used to find the exact volume of acid needed to neutralise a known volume of alkali (or vice versa). Memory tip: 'Titration' contains 'rate' – you add drop by drop until the indicator changes colour.
滴定 — 一种用来精确测定中和所需酸（或碱）体积的技术。速记：'Titration' 含有 'rate'——逐滴加入，直到指示剂变色。
5. Redox & Reactivity | 氧化还原与活泼性
Oxidation and reduction are always paired – you cannot have one without the other. The mnemonic OIL RIG (Oxidation Is Loss, Reduction Is Gain of electrons) is famous for a reason, but you also need the terms 'oxidising agent' and 'reducing agent' solidly separated.
氧化与还原永远成对出现——不可能只有其一。著名的助记符 OIL RIG（氧化是失电子，还原是得电子）自有其道理，但你还必须把'氧化剂'和'还原剂'的概念彻底分清。
Oxidation — Loss of electrons; gain of oxygen or loss of hydrogen. Memory tip: 'OIL' – Oxidation Is Loss (of electrons).
氧化 — 失去电子；得氧或失氢。速记：'OIL'——氧化即失（电子）。
Reduction — Gain of electrons; loss of oxygen or gain of hydrogen. Memory tip: 'RIG' – Reduction Is Gain (of electrons).
还原 — 得到电子；失氧或得氢。速记：'RIG'——还原即得（电子）。
Oxidising agent — The substance that accepts electrons and gets reduced itself. Memory tip: The agent causes oxidation but suffers reduction – it's like a robber who steals electrons and becomes richer (more negative).
氧化剂 — 接受电子而自身被还原的物质。速记：氧化剂引发氧化，但自身被还原——像个小偷，偷走电子后自己变得更富（更负）。
Reducing agent — The substance that donates electrons and gets oxidised itself. Memory tip: The agent causes reduction but is itself oxidised – a generous donor that gives away electrons.
还原剂 — 给出电子而自身被氧化的物质。速记：还原剂引发还原，但自身被氧化——慷慨的电子捐赠者。
Reactivity series — A list of metals arranged in order of their tendency to lose electrons and form positive ions. Memory tip: Please Send Lions, Cats, Monkeys And Cute Zebras... popular mnemonics help recall the order from potassium to zinc.
金属活动性顺序 — 金属按失去电子形成阳离子的倾向大小排列的顺序。速记：钾钙钠镁铝……常见顺口溜帮你记住从钾到锌的序列。
6. Electrochemistry | 电化学
Electrolysis vocabulary sounds technical but can be simplified: think of the cell as a battlefield where anions rush to the anode and cations to the cathode. The key is remembering which electrode attracts which ion.
电解词汇听上去很专业，但可以简化：把电解池想象成一个战场，阴离子向阳极冲锋，阳离子向阴极冲锋。关键在于记住哪个电极吸引哪种离子。
Electrolysis — The decomposition of an ionic compound, when molten or in solution, by passing an electric current. Memory tip: 'Electro-' = electricity, '-lysis' means splitting – splitting with electricity.
电解 — 使电流通过熔融态或溶液中的离子化合物，使其分解的过程。速记：'Electro-' = 电，'-lysis' = 分解——用电来分解。
Anode — The positive electrode where oxidation (loss of electrons) occurs. Memory tip: 'An Ox' – Anode, Oxidation. Anions go to the anode because opposites attract.
阳极 — 发生氧化反应（失电子）的正极。速记：'An Ox'——Anode 与 Oxidation；阴离子游向阳极，因为异性相吸。
Cathode — The negative electrode where reduction (gain of electrons) occurs. Memory tip: 'Red Cat' – Reduction at the Cathode. Cations migrate to the cathode.
阴极 — 发生还原反应（得电子）的负极。速记：'Red Cat'——Reduction 在 Cathode；阳离子迁向阴极。
Electrolyte — The molten or dissolved ionic compound that conducts electricity and is decomposed. Memory tip: 'Electrolyte' = 'electro-light' – it lets electricity flow and breaks apart.
电解质 — 熔融或溶解状态下能导电并被分解的离子化合物。速记：'Electrolyte' 像 'electro-light'——让电流通过并自身碎裂。
Electroplating — Using electrolysis to coat a metal object with a thin layer of another metal. Memory tip: 'Plate' on the cathode – you want the object plated, so make it the cathode where metal ions deposit.
电镀 — 利用电解在金属物体表面镀上一层另一种金属的薄层。速记：'Plate' 发生在阴极——要把物品镀上金属，就让它做阴极，金属离子在此沉积。
7. Organic Chemistry: Basic Terms | 有机化学基础术语
Organic chemistry introduces a family of compounds called hydrocarbons. Their names sound systematic because they are: the prefix tells the number of carbons, the suffix reveals the homologous series. Once you crack the naming code, organic structures lose their mystery.
有机化学引入了一族称为烃的化合物。它们的名称听上去很有系统，事实也如此：前缀告诉你碳原子数，后缀揭示同系序列。一旦破解命名密码，有机结构就不再神秘。
Hydrocarbon — A compound containing only hydrogen and carbon. Memory tip: 'Hydro' (water) + 'carbon' – but it actually contains hydrogen and carbon, no water.
烃 — 只含碳和氢的化合物。速记：'Hydro' (水) + 'carbon'——实际上不含水，只有氢和碳。
Homologous series — A family of organic compounds with the same general formula and similar chemical properties, each member differing by CH₂. Memory tip: 'Homo' = same, 'logous' = ratio – same ratio pattern, stepwise CH₂ addition.
同系物 — 具有相同通式和相似化学性质的一系列有机化合物，相邻成员相差一个 CH₂。速记：'Homo' = 相同，'logous' = 比例——相同比例模式，逐级加 CH₂。
Alkane — A saturated hydrocarbon with single bonds only, general formula CₙH₂ₙ₊₂. Memory tip: 'Alkane' sounds like 'all cane' – all single bonds, like a straight cane.
烷烃 — 只含单键的饱和烃，通式 CₙH₂ₙ₊₂。速记：'Alkane' 像 'all cane'——全是单键，像一根笔直的手杖。
Alkene — An unsaturated hydrocarbon containing at least one C=C double bond, general formula CₙH₂ₙ. Memory tip: 'Alkene' with an 'e' for 'extra' bond – the double bond makes it unsaturated.
烯烃 — 含至少一个 C=C 双键的不饱和烃，通式 CₙH₂ₙ。速记：'Alkene' 里有 'e' 代表 'extra' 键——双键使其不饱和。
Functional group — An atom or group of atoms that gives a compound its characteristic reactions. Memory tip: It 'functions' as the reactive part; the rest of the molecule just comes along for the ride.
官能团 — 决定一类化合物特征反应的原子或原子团。速记：它'官'控反应活性部分；分子其余部分只是随从。
8. Rate of Reaction & Equilibrium | 反应速率与平衡
Collision theory connects particles to pace. Words like 'activation energy' and 'catalyst' appear in virtually every exam session. Understanding them not only helps with recall but also sharpens your graph-drawing skills for the rate topic.
碰撞理论将粒子与反应快慢联系起来。'活化能'和'催化剂'之类的词汇几乎每次考试都会出现。理解它们不仅能帮助记忆，还能提升你在速率专题中绘制图形的能力。
Rate of reaction — The change in concentration of a reactant or product per unit time. Memory tip: 'Rate' reminds you of 'race' – how fast the reactants race to become products.
反应速率 — 单位时间内反应物或产物浓度的变化。速记：'Rate' 让你想到 'race'——反应物向产物赛跑的速度。
Activation energy (Eₐ) — The minimum energy colliding particles must have for a reaction to occur. Memory tip: 'Activation' like 'activation key' – you need enough energy to unlock the reaction.
活化能 (Eₐ) — 碰撞粒子发生反应所必须具备的最低能量。速记：'Activation' 像 '激活码'——需要足够能量来解锁反应。
Catalyst — A substance that speeds up a reaction without being chemically changed or used up, by providing an alternative pathway of lower activation energy. Memory tip: 'Cat' speeds things up like a cat-on-a-hot-tin-roof – it lowers the energy barrier.
催化剂 — 能加快反应速率而自身在化学上保持不变、不被消耗的物质，它提供一条活化能更低的替代路径。速记：'Cat' 像热锅上的猫——加速反应，降低能垒。
Dynamic equilibrium — The state in a reversible reaction where the forward and backward rates are equal, and the concentrations of reactants and products remain constant. Memory tip: 'Dynamic' means moving – the reactions keep happening, but the amounts stay steady.
动态平衡 — 可逆反应中，正逆反应速率相等，反应物和生成物浓度保持恒定的状态。速记：'动态' 意味着仍在运动——反应持续进行，但各组分量保持稳定。
Le Chatelier's principle — If a system at equilibrium is subjected to a change in concentration, temperature or pressure, the position of equilibrium shifts to counteract the change. Memory tip: The system 'chats' back – like a stubborn child doing the opposite of what you force.
勒夏特列原理 — 如果处于平衡的体系受到浓度、温度或压力的改变，平衡将向减弱该改变的方向移动。速记：体系会'聊天'回击——像个固执的孩子，总跟你对着干。
9. States of Matter & Separation | 物质状态与分离
The language used to describe changes of state and separation techniques is precise. Mislabeling 'boiling' as 'evaporation' or 'distillate' as 'filtrate' can cost marks in practical based questions. Link each word to the process it represents.
用来描述状态变化和分离技术的语言十分精确。把'沸腾'误标为'蒸发'，或把'馏出液'错称为'滤液'，在实验相关考题中会丢分。将每个词汇与其对应的过程紧密挂钩。
Sublimation — The direct change from solid to gas without passing through the liquid phase. Memory tip: 'Sublime' like 'sublime art' – solid vanishes into vapour like magic.
升华 — 固体不经过液态直接转变为气体的过程。速记：'Sublime' 像 'sublime art'——固体如魔法般消失为蒸气。
Condensation — The change from gas to liquid on cooling. Memory tip: 'Condense' means to pack together – gas molecules pack into a liquid.
冷凝 — 气体冷却变为液体的过程。速记：'Condense' 意为压缩——气体分子挤成液体。
Filtrate — The liquid that passes through the filter paper during filtration. Memory tip: 'Filtrate' = 'fill-tray' – it fills the receiving beaker.
滤液 — 过滤时穿过滤纸的液体。速记：'Filtrate' = 'fill-tray'——它填满接液的容器。
Distillate — The condensed liquid collected during distillation. Memory tip: 'Distillate' = 'distilled late' – it arrives after condensation, drop by drop.
馏出液 — 蒸馏过程中经冷凝收集到的液体。速记：'Distillate' = 'distilled late'——冷凝后姗姗而来的液滴。
Chromatography — A technique used to separate mixtures of soluble substances based on their different solubilities. Memory tip: 'Chroma' means colour – it produces a pattern of colours, though it works for colourless substances too (use locating agents).
色谱法 — 基于溶解度差异分离可溶性混合物的一种技术。速记：'Chroma' 意为颜色——它产生彩色图谱，不过对无色物质同样有效（需用显色剂）。
10. Practical & Safety Vocabulary | 实验与安全术语
Precision in naming apparatus and hazards is expected in CIE practical assessments. Saying 'measuring cylinder' instead of 'beaker' or 'irritant' instead of 'corrosive' shows the examiner that you can work safely and accurately in a lab.
CIE 实验评估要求对仪器和危险的称呼准确无误。用'量筒'而不是'烧杯'，或用'刺激性'而不是'腐蚀性'，可以向考官展示你具备在实验室安全、精确操作的能力。
Meniscus — The curved surface of a liquid in a narrow container, read at eye level for accurate volume measurement. Memory tip: 'Meniscus' sounds like 'mini disc' – imagine a tiny curved disc on the liquid surface; always read the bottom of the concave meniscus.
弯月面 — 液体在细容器内的曲面，读取体积时需与视线水平。速记：'Meniscus' 音似 'mini disc'——想象液面上有一个微小的弯曲圆盘；凹液面要读取底部。
Anhydrous — A substance that contains no water of crystallisation; often used to describe salts. Memory tip: 'An-' = without, 'hydrous' = water – without water.
无水 — 不含结晶水的物质；常用于描述盐。速记：'An-' = 无，'hydrous' = 水——无水。
Hazard symbol — A pictogram on a chemical container warning of specific dangers, e
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