📚 Year 10 Edexcel Chemistry: Terminology Quick Memorization Guide | Year 10 Edexcel 化学：词汇术语速记指南
Mastering chemistry vocabulary is not just about passing exams — it lays the foundation for clear scientific thinking. This guide groups key Edexcel Year 10 terms into memorable clusters, explains each one with simple English and Chinese definitions, and offers memory tricks that turn abstract words into lasting knowledge.
掌握化学词汇不仅是为了通过考试，更是为清晰的科学思维打基础。本指南将 Edexcel Year 10 阶段的核心术语分为易于记忆的组群，每个词条都配有简洁的中英文释义和记忆窍门，帮助你把抽象词汇变成牢固的知识。
1. Atomic Structure & Subatomic Particles | 原子结构与亚原子粒子
Atom – the smallest particle of an element that retains its chemical properties. Think of it as a tiny solar system with a dense nucleus at the centre.
原子 – 保持元素化学性质的最小粒子。可以把它想像成一个微型的太阳系，中央有一个致密的核。
Proton – a positively charged subatomic particle found in the nucleus, with a relative mass of 1. The number of protons determines the element (atomic number).
质子 – 原子核中带正电荷的亚原子粒子，相对质量为 1。质子的数量决定了元素种类（原子序数）。
Neutron – a neutral particle also in the nucleus, mass ≈ 1. It stabilises the nucleus by reducing electrostatic repulsion between protons.
中子 – 同样位于核内的中性粒子，质量约等于 1。它通过减少质子间的静电排斥来稳定原子核。
Electron – a negatively charged particle with a relative mass of 1/1840, moving around the nucleus in shells. Chemical reactions mainly involve the loss, gain, or sharing of electrons.
电子 – 带负电的粒子，相对质量约为 1/1840，在核外分层运动。化学反应主要涉及电子的得失或共享。
Memory trick: Proton = Positive (both start with P). Neutron = Neutral (both start with N). Electron = Electricity (flow of electrons).
记忆法： Proton（质子）与 Positive（正电）均以 P 开头；Neutron（中子）与 Neutral（中性）均以 N 开头；Electron（电子）是 Electricity（电）的源头。
2. Electron Configuration & Shells | 电子排布与电子层
Electron shell – an energy level around the nucleus where electrons are found. The first shell holds up to 2 electrons, the second up to 8, the third up to 8 (at Year 10 level).
电子层 – 原子核周围电子所处的能级。第一层最多容纳 2 个电子，第二层最多 8 个，第三层最多 8 个（Year 10 范围）。
Valence electrons – electrons in the outermost shell. They determine an element’s chemical reactivity and bonding behaviour. Group number (1–7) gives the number of valence electrons for main-group elements.
价电子 – 最外层的电子。它们决定元素的化学活性和成键方式。主族元素的族号（1–7）等于其价电子数。
Noble gas configuration – a full outer shell of electrons (8 electrons, or 2 for helium), making elements extremely stable. Atoms often react to achieve this stable arrangement.
稀有气体电子排布 – 最外层全满（8 个电子，氦为 2 个），使得元素异常稳定。原子常常通过反应来达到这种稳定结构。
Diagram prompt: Draw a circle for the nucleus with protons/neutrons, then concentric circles for shells. Add electrons as dots — maximum 2,8,8 moving outward. Visual memory always outperforms rote text.
绘图提示： 画一个圆圈表示核内质子和中子，外面画同心圆层，用圆点表示电子——从内向外依次最多 2,8,8。视觉记忆总比死记文字强。
3. The Periodic Table & Groups | 元素周期表与族
Period – a horizontal row in the periodic table. Elements in the same period have the same number of electron shells. Period 2 elements have two shells, Period 3 have three shells.
周期 – 周期表中的横行。同一周期的元素具有相同的电子层数。第 2 周期元素有两层电子，第 3 周期有三层。
Group – a vertical column. Elements in the same group have the same number of valence electrons and similar chemical properties. Group 1: alkali metals; Group 7: halogens; Group 0 (or 8): noble gases.
族 – 纵列。同族元素价电子数相同，化学性质相似。第 1 族：碱金属；第 7 族：卤素；第 0 族（或第 8 族）：稀有气体。
Alkali metals – Group 1 (Li, Na, K, Rb, Cs). Soft, very reactive, stored under oil, react vigorously with water to form alkaline solutions. Reactivity increases down the group because the outer electron is more easily lost.
碱金属 – 第 1 族（Li, Na, K, Rb, Cs）。质地柔软，极活泼，保存在油中，与水剧烈反应生成碱性溶液。反应活性向下增强，因为外层电子越来越容易失去。
Halogens – Group 7 (F, Cl, Br, I, At). Non-metals, exist as diatomic molecules (F₂, Cl₂, Br₂, I₂), reactivity decreases down the group. A more reactive halogen can displace a less reactive one from a salt solution.
卤素 – 第 7 族（F, Cl, Br, I, At）。非金属，以双原子分子形式存在（F₂, Cl₂, Br₂, I₂），反应活性向下减弱。较活泼的卤素可将较不活泼的卤素从其盐溶液中置换出来。
Noble gases – Group 0/8 (He, Ne, Ar, Kr, Xe, Rn). Colourless, monatomic, unreactive due to full outer shells. Used in lighting and inert atmospheres.
稀有气体 – 第 0/8 族（He, Ne, Ar, Kr, Xe, Rn）。无色，单原子，因最外层全满而极不活泼。用于照明和惰性保护气氛。
4. Ionic Bonding & Formulae | 离子键与化学式
Ion – a charged particle formed when an atom loses or gains electrons. Metals tend to lose electrons to form positive ions (cations); non-metals tend to gain electrons to form negative ions (anions).
离子 – 原子得失电子后形成的带电粒子。金属倾向于失去电子形成阳离子（正离子）；非金属倾向于得到电子形成阴离子（负离子）。
Ionic bond – the strong electrostatic attraction between oppositely charged ions in a giant ionic lattice. High melting points, conduct electricity when molten or dissolved.
离子键 – 巨大的离子晶格中带相反电荷的离子之间的强静电吸引力。熔点高，熔融或溶于水时能导电。
Formula unit – the simplest ratio of ions in an ionic compound, e.g. NaCl (Na⁺:Cl⁻ = 1:1), MgCl₂ (Mg²⁺:Cl⁻ = 1:2). Always use the crossover method: swap the charges to get subscripts.
化学式单元 – 离子化合物中离子的最简整数比，如 NaCl（Na⁺:Cl⁻ = 1:1），MgCl₂（Mg²⁺:Cl⁻ = 1:2）。始终使用交叉法：交换电荷数值即得下标。
Polyatomic ions – ions made of more than one atom, like sulfate SO₄²⁻, nitrate NO₃⁻, carbonate CO₃²⁻, ammonium NH₄⁺. Treat the whole group as a single charged unit when balancing formulae.
多原子离子 – 由多个原子组成的离子，如硫酸根 SO₄²⁻、硝酸根 NO₃⁻、碳酸根 CO₃²⁻、铵根 NH₄⁺。在配平化学式时，将整个离子团视为一个带电单元。
Memory hook: ‘Cat-ions’ are ‘paws-itive’ – cats have paws, and they leave positive paw prints. ‘Anion’ sounds like ‘onion’, which can make you cry negative tears.
记忆钩子： 阳离子（Cation）像猫（Cat）一样留下“positive paw prints”（正电爪印）。阴离子（Anion）读起来像“洋葱”（onion），让你流下“negative tears”（负电泪水）。
5. Covalent Bonding & Molecules | 共价键与分子
Covalent bond – a shared pair of electrons between non-metal atoms. Each atom contributes one electron to the pair, achieving noble gas configuration by sharing.
共价键 – 非金属原子间共享的电子对。每个原子提供一个电子，通过共享达到稀有气体稳定结构。
Molecule – a group of two or more atoms held together by covalent bonds, e.g. H₂O, CO₂, O₂. They have distinct shapes and relatively low melting/boiling points compared to ionic compounds.
分子 – 由共价键结合的两个或更多原子组成的基团，例如 H₂O、CO₂、O₂。分子具有特定形状，熔沸点相比离子化合物较低。
Simple molecular substances – consist of small discrete molecules with weak intermolecular forces, hence low melting points. Do not conduct electricity.
简单分子物质 – 由分离的小分子组成，分子间作用力弱，因此熔点低，不导电。
Giant covalent structures – diamond, graphite, silicon dioxide. Each atom is bonded by strong covalent bonds in a continuous network. Very high melting points, hard (except graphite which is slippery due to layers).
巨型共价结构 – 金刚石、石墨、二氧化硅。每个原子通过强共价键连接成连续网状结构。熔点极高，硬度大（石墨例外，因层状结构而滑腻）。
Dot-and-cross diagram: Use dots for electrons from one atom and crosses for the other to show sharing pairs. Always check outer shells achieve 8 electrons (or 2 for hydrogen).
点叉图： 用一个原子的电子用点、另一个用叉来表示共享电子对。务必检查外层是否满足了8电子（氢为2电子）。
6. Chemical Equations & State Symbols | 化学方程式与状态符号
Word equation – a simple way to represent a reaction using chemical names, e.g. ‘magnesium + oxygen → magnesium oxide’. Useful for initial understanding but doesn’t show ratios.
文字方程式 – 用化学名称表示反应，例如“镁 + 氧气 → 氧化镁”。适合初步理解，但不显示量的关系。
Balanced symbol equation – uses chemical formulae and coefficients to show the same number of each type of atom on both sides, following the law of conservation of mass.
配平的符号方程式 – 用化学式与系数表示，确保每种原子的数目在两边相等，遵循质量守恒定律。
State symbols – (s) solid, (l) liquid, (g) gas, (aq) aqueous (dissolved in water). Always include them in equations when presenting your written answer.
状态符号 – (s) 固体，(l) 液体，(g) 气体，(aq) 水溶液（溶于水）。作答时方程式里务必标上状态符号。
Example: 2Mg(s) + O₂(g) → 2MgO(s). The large number before the formula is the coefficient; the subscript within the formula shows the number of atoms in a molecule (O₂ means 2 oxygen atoms bonded together).
示例： 2Mg(s) + O₂(g) → 2MgO(s)。化学式前的较大数字为系数；化学式中的下标表示分子中原子的数目（O₂ 表示两个氧原子结合成一个氧分子）。
Quick balance trick: Save elements that appear in only one substance on each side for balance last, like oxygen or hydrogen. Count atoms systematically with a tally.
快速配平法： 将只在反应物和生成物中各出现一次的元素留到最后配平，比如氧或氢。用计数表系统清点原子数。
7. Acids, Bases & pH Scale | 酸、碱与 pH 值
Acid – a substance that releases hydrogen ions (H⁺) in aqueous solution. Common lab acids: HCl, H₂SO₄, HNO₃. They have pH < 7, turn litmus red.
酸 – 在水溶液中释放氢离子（H⁺）的物质。常见实验室酸：HCl、H₂SO₄、HNO₃。pH < 7，使石蕊试纸变红。
Base – a substance that neutralises acids, often metal oxides or hydroxides. Soluble bases are called alkalis. Alkalis release hydroxide ions (OH⁻) in water and have pH > 7.
碱 – 能中和酸的物质，常为金属氧化物或氢氧化物。可溶的碱称为 alkali（碱）。碱在水中释放氢氧根离子（OH⁻），pH > 7。
Neutralisation – reaction between an acid and a base to form a salt and water: H⁺ + OH⁻ → H₂O. The salt formed depends on the acid used (chloride from HCl, sulfate from H₂SO₄, nitrate from HNO₃).
中和反应 – 酸与碱反应生成盐和水：H⁺ + OH⁻ → H₂O。生成的盐取决于所用酸（HCl 生成氯化物，H₂SO₄ 生成硫酸盐，HNO₃ 生成硝酸盐）。
pH scale – a measure of acidity from 0 (strongly acidic) to 14 (strongly alkaline), with 7 neutral. Each step represents a tenfold change in H⁺ concentration. Use universal indicator or pH probe.
pH 标度 – 测量酸碱性的尺度，范围 0（强酸）至 14（强碱），7 为中性。每变化 1 个单位，H⁺浓度改变 10 倍。使用通用指示剂或 pH 计测量。
Memory phrase: ‘Acid adds H⁺, Alkali adds OH⁻. Neutral makes water — that’s the core.’
记忆顺口溜： “酸给 H⁺，碱给 OH⁻，中和变成 H₂O，核心在此。”
8. Reaction Types & Energy Changes | 反应类型与能量变化
Combustion – an exothermic reaction where a substance burns in oxygen, releasing heat and light. Complete combustion of hydrocarbons produces CO₂ and H₂O.
燃烧 – 物质在氧气中燃着并释放光和热的放热反应。碳氢化合物的完全燃烧生成 CO₂ 和 H₂O。
Thermal decomposition – breaking down a compound by heating. For example, calcium carbonate (CaCO₃) decomposes into calcium oxide (CaO) and carbon dioxide (CO₂). An endothermic process.
热分解 – 通过加热使化合物分解的过程。例如碳酸钙（CaCO₃）分解为氧化钙（CaO）和二氧化碳（CO₂）。这是吸热过程。
Exothermic – reactions that release energy to the surroundings, often causing a temperature rise. Examples: combustion, neutralisation, respiration.
放热反应 – 向周围环境释放能量的反应，通常使温度升高。例如：燃烧、中和、呼吸作用。
Endothermic – reactions that absorb energy from the surroundings, leading to a temperature drop. Examples: thermal decomposition, photosynthesis, dissolving ammonium nitrate.
吸热反应 – 从周围环境吸收能量的反应，导致温度下降。例如：热分解、光合作用、硝酸铵溶解。
Displacement – a more reactive element pushes out a less reactive one from its compound. The reactivity series orders metals (K, Na, Ca, Mg, Al, (C), Zn, Fe, Pb, (H), Cu, Ag, Au).
置换反应 – 较活泼的元素将较不活泼的元素从其化合物中置换出来。金属活动性顺序大致为 K、Na、Ca、Mg、Al、(C)、Zn、Fe、Pb、(H)、Cu、Ag、Au。
Memory for reactivity series: ‘Please Stop Calling My Aunt Zelda In London — Her Carriage Always Goes Quickly.’ The first letter of each word matches the metal symbol sequence (with some imagination).
活动性顺序记忆： 可用英文句子“Please Stop Calling My Aunt Zelda In London — Her Carriage Always Goes Quickly”的首字母助记金属顺序，中文则可用“嫁钙纳美女，心惊铁皮痛，青铜银金”谐音法。
9. Quantitative Chemistry Terms | 定量化学术语
Relative atomic mass (Aᵣ) – the average mass of an atom of an element compared to 1/12 of the mass of a carbon‑12 atom. Takes into account isotopic abundances.
相对原子质量（Aᵣ） – 元素一个原子的平均质量与碳‑12 原子质量的 1/12 的比值，考虑了同位素丰度。
Relative formula mass (Mᵣ) – the sum of relative atomic masses of all atoms in a formula unit. For ionic compounds we call it relative formula mass; for molecules it is also relative molecular mass.
相对式量（Mᵣ） – 化学式中所有原子的相对原子质量之和。对于离子化合物称相对式量，对于分子也称相对分子质量。
Mole – the amount of substance containing 6.02 × 10²³ particles (Avogadro constant). One mole of atoms of an element has a mass in grams equal to its relative atomic mass. Central to quantitative work at GCSE.
摩尔（mol） – 包含 6.02 × 10²³ 个粒子的物质的量（阿伏伽德罗常数）。某种元素的 1 摩尔原子的质量，以克为单位，数值等于其相对原子质量。这是 GCSE 化学计量的核心。
Concentration – often measured in g/dm³ or mol/dm³. Concentration = mass of solute (g) ÷ volume of solution (dm³). Memorise the triangle: mass at top, concentration × volume at bottom.
浓度 – 通常以 g/dm³ 或 mol/dm³ 为单位。浓度 = 溶质质量 (g) ÷ 溶液体积 (dm³)。记住公式三角：质量在上，浓度 × 体积在下。
Conservation of mass – total mass of reactants = total mass of products in a closed system. In an open system, a gas produced or consumed can alter the apparent mass.
质量守恒 – 在密闭系统中，反应物的总质量等于生成物的总质量。在敞口系统中，生成或消耗的气体会改变表观质量。
10. Common Misconceptions & Memory Tricks | 常见误区与记忆窍门
Misconception 1: ‘Molecules are only for covalent compounds.’ Ionic compounds do not form molecules; they form giant lattice structures. Use the term ‘formula unit’ instead.
误区一： “分子只属于共价化合物”。离子化合物不形成分子，而是巨型晶格结构。应使用“式单元”一词。
Misconception 2: ‘The subscript after an element in a formula indicates the charge.’ It actually indicates the number of atoms of that element. Charge is shown as 2⁺, 3⁻, etc.
误区二： “化学式中元素后的下标表示电荷”。实际上它表示该元素的原子个数。电荷写作 2⁺、3⁻ 等形式。
Misconception 3: ‘More acidic means more hydrogen atoms in the formula.’ Acidity depends on the extent of H⁺ ion dissociation, not the number of hydrogen atoms in the formula. For example, ethanoic acid (CH₃COOH) has 4 H atoms but is a weak acid, while HCl has 1 H atom and is a strong acid.
误区三： “酸性强弱取决于化学式中氢原子数量”。酸性取决于 H⁺ 离子的解离程度，而非化学式中氢原子数。例如乙酸（CH₃COOH）有 4 个氢原子却是弱酸，而 HCl 只有 1 个氢原子却是强酸。
Memory aid: Electrolysis terms – Anode attracts anions (both start with A and N). Cathode attracts cations (both start with Ca). Oxidation is loss of electrons (OIL), Reduction is gain of electrons (RIG) – ‘OIL RIG’.
电解术语记忆： 阳极（Anode）吸引阴离子（Anion）（均以 AN 开头）；阴极（Cathode）吸引阳离子（Cation）（均以 Ca 开头）。氧化是失电子（OIL），还原是得电子（RIG）——“OIL RIG”口诀。
Final advice: Create bilingual flashcards — English term on one side, Chinese definition and a visual symbol on the other. Every time you learn an equation, read it aloud in both languages. The dual coding of sound, image, and translation builds robust neural connections.
最后建议： 制作双语抽认卡——正面写英文术语，背面写中文释义和一个视觉符号。每学一个方程式，都用两种语言大声朗读。声音、图像和翻译的多重编码会在大脑中建立坚实的神经联结。
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