CCEA Year 13 Chemistry: Quick Vocabulary Memorisation Guide | CCEA Year 13 化学词汇术语速记指南

📚 CCEA Year 13 Chemistry: Quick Vocabulary Memorisation Guide | CCEA Year 13 化学词汇术语速记指南

Master the essential terminology for CCEA Year 13 Chemistry with this bilingual quick-reference guide. Each term is explained in English with a memory hook, then clearly presented in Chinese. Use these memory aids to build confidence, tackle exam questions, and connect ideas across physical, inorganic and organic chemistry.

掌握 CCEA Year 13 化学的核心术语，从这份双语速记指南开始。每个术语先用英文解释并附上记忆口诀，再用中文详细说明。用这些记忆辅助工具建立信心，应对考试题目，并将物理化学、无机化学和有机化学的概念串联起来。

1. Atomic Structure and Isotopes | 原子结构与同位素

Atomic number (Z): The number of protons in the nucleus. Memory tip: 'Z is the proton count – think of the Z as the ultimate identity number, giving the element its name.'

原子序数 (Z)：原子核中的质子数。记忆法：“Z 就等于质子数，Z 是元素的身份码，决定了它是哪种元素。”

Mass number (A): The total number of protons and neutrons in the nucleus. Tip: 'A = all nucleons, so A stands for all the big particles in the centre.'

质量数 (A)：原子核中质子与中子的总数。技巧：“A 代表所有 (All) 核子，是一切重粒子的总和。”

Isotope: Atoms of the same element (same Z) with different mass numbers due to different numbers of neutrons. Mnemonic: 'Isotopes are equal in protons, but different in neutrons – same personality, different weight.'

同位素：相同元素（Z相同）但质量数不同的原子，这是因为中子数不同。助记：“同位素质子数相同，中子数不同——身份相同，体重不同。”

Relative atomic mass (Aᵣ): The weighted average mass of an atom compared to ¹⁄₁₂ of the mass of carbon-12. Remember: 'Average mass of all the isotopes, not just a single one.'

相对原子质量 (Aᵣ)：一个元素的原子平均质量与碳-12原子质量的1/12相比较的值。记忆：“是所有同位素的加权平均质量，不是某个原子单独的质量。”

First ionisation energy: The energy required to remove one mole of electrons from one mole of gaseous atoms to form one mole of gaseous 1+ ions. Mnemonic: 'First ionisation – pulling one electron away from a lonely gas atom.'

第一电离能：从一摩尔气态原子中移走一摩尔电子，形成一摩尔气态正一价离子所需的能量。助记：“第一电离能就是把气体原子最外层的电子使劲拽走。”

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2. Chemical Bonding and Structure | 化学键与结构

Ionic bonding: Electrostatic attraction between oppositely charged ions formed by complete transfer of electrons. Tip: 'I-onic is I gave away an electron – think of positive and negative ions holding hands tightly.'

离子键：由电子完全转移形成的阴阳离子间的静电引力。记忆：“离子键就是正离子和负离子手拉手，靠电的吸引力紧紧拥抱。”

Covalent bonding: A shared pair of electrons between two atoms. Mnemonic: 'Co-valent = co-operating by sharing valence electrons.'

共价键：两个原子间共用一对电子。助记：“共价键就是合作共享 (co) 价 (valent) 电子。”

Metallic bonding: Attraction between a lattice of positive metal ions and a 'sea' of delocalised electrons. Visualise: 'Metal atoms sit in a sea of wandering electrons that can move and conduct electricity.'

金属键：正金属离子晶格与离域电子“海洋”之间的吸引力。想象：“金属原子浸泡在自由移动的电子海洋中，这些电子可以导电。”

Dative covalent (coordinate) bond: A covalent bond where both shared electrons come from the same atom. Tip: 'One atom is generous – it donates both electrons.'

配位共价键：共用电子对完全由其中一个原子提供的共价键。技巧：“一个原子特别大方，把两个电子都给了。”

Electronegativity: The ability of an atom to attract the bonding pair of electrons in a covalent bond. Mnemonic: 'The greedy ability to pull electron clouds towards itself.'

电负性：在共价键中，原子吸引成键电子对的能力。记忆：“电负性就是原子抢夺电子云的能力，越贪心值越大。”

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3. Shapes of Molecules and Intermolecular Forces | 分子形状与分子间作用力

VSEPR theory: Valence Shell Electron Pair Repulsion theory – electron pairs around a central atom repel and arrange themselves as far apart as possible. Tip: 'Electron pairs are like magnets with the same pole; they push away and shape the molecule.'

价层电子对互斥理论 (VSEPR)：中心原子周围的电子对相互排斥，会尽可能远离彼此。记忆：“电子对就像同极磁铁，互相推开，决定了分子的形状。”

Linear shape: Bond angle 180°, occurs with two electron pairs (e.g. BeCl₂, CO₂). Remember: 'Two pairs, straight line.'

直线形：键角180°，有两对电子对时出现（如 BeCl₂, CO₂）。记忆：“两对成键，直接拉成一条直线。”

Trigonal planar: Bond angle 120°, three electron pairs (e.g. BF₃). Visualise: 'Flat triangle, all angles 120°.'

平面三角形：键角120°，三对电子对（如 BF₃）。想象：“一个平面三角形，角都相等。”

Tetrahedral: Bond angle 109.5°, four electron pairs (e.g. CH₄). Mnemonic: 'Four pairs flying to corners of a tetrahedron.'

四面体形：键角109.5°，四对电子对（如 CH₄）。助记：“四对电子飞向四面体的四个顶点。”

Hydrogen bonding: A strong dipole-dipole attraction between a lone pair on N, O or F and a δ+ H bonded to N, O or F. Tip: 'The H of one molecule is glued to the lone pair of another – think of water's high boiling point.'

氢键：存在于 N、O 或 F 上的孤对电子与连接在 N、O 或 F 上的 δ+ 氢之间的强偶极-偶极吸引力。技巧：“一个分子上的 H 粘住了另一个分子上的孤对电子，这就是水沸点异常高的原因。”

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4. Moles, Formulae and Equations | 摩尔、化学式与方程式

Mole (mol): The amount of substance containing 6.02 × 10²³ specified particles. Mnemonic: 'A mole is a super-sized dozen for chemists.'

摩尔 (mol)：含有6.02 × 10²³ 个指定微粒的物质的数量。记忆：“摩尔就是化学家用的超级打（dozen）。”

Molar mass (M): The mass of one mole of a substance, units g mol⁻¹. Tip: 'Molar mass = Mr in grams, just add per mole.'

摩尔质量 (M)：一摩尔物质的质量，单位 g mol⁻¹。技巧：“摩尔质量就是相对分子质量后面加上克每摩尔。”

Empirical formula: The simplest whole-number ratio of atoms in a compound. Mnemonic: 'Empirical = the most basic blueprint, like CH₂O can become C₆H₁₂O₆.'

实验式（最简式）：化合物中各种原子最简单的整数比。助记：“实验式就是最简陋的构图，就像是 CH₂O 可以膨胀成 C₆H₁₂O₆。”

Percentage yield: (actual mass of product / theoretical mass of product) × 100. Tip: 'You never get 100% – something always spills or sticks in lab.'

产率：（实际产物质量 / 理论产物质量）× 100。技巧：“实验总是有损耗，产率很难达到100%。”

Atom economy: (mass of desired product / total mass of reactants) × 100. Mnemonic: 'Atom economy measures how many reactant atoms end up in the useful product – green chemistry star.'

原子经济性：（目标产物质量 / 全部反应物总质量）× 100。记忆：“原子经济衡量有多少反应物原子进入了有用产物，是绿色化学的重要指标。”

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5. Energetics | 能量学

Enthalpy change (ΔH): The heat energy change measured at constant pressure. Standard conditions: 298 K, 100 kPa. Memory: 'ΔH is the heat absorbed or released, minus sign means exothermic.'

焓变 (ΔH)：在恒压条件下测得的热能变化。标准条件：298 K，100 kPa。记忆：“ΔH 表示吸收或放出的热量，带负号就是放热。”

Standard enthalpy of combustion (ΔH⦵_c): The enthalpy change when one mole of a substance is completely burned in oxygen under standard conditions. Tip: 'Combustion always releases heat – ΔH is always negative.'

标准燃烧焓 (ΔH⦵_c)：在标准条件下，一摩尔物质完全燃烧的焓变。技巧：“燃烧就是放热，ΔH 总是负的。”

Hess's Law: The total enthalpy change for a reaction is independent of the route taken. Mnemonic: 'Hess says you can go directly or take a scenic route; the energy bill stays the same.'

赫斯定律：一个反应的总焓变与反应途径无关。助记：“赫斯说不管你走直路还是绕路，能量账单是一样的。”

Mean bond enthalpy: The average energy required to break one mole of a given covalent bond in a range of compounds. Tip: 'The average breaking energy – bonds are stronger in some settings, so we take the mean.'

平均键焓：在一系列化合物中，断裂一摩尔某特定共价键所需的平均能量。技巧：“键的强度因环境而异，就用平均值来估计。”

Calorimetry: Measuring heat changes using a calorimeter; q = mcΔT. Mnemonic: 'The calorimeter is a heat accountant – mass × specific heat capacity × temperature rise.'

量热法：用量热计测量热量变化；q = mcΔT。记忆：“量热计是个热量会计，公式是质量 × 比热容 × 升温。”

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6. Kinetics | 动力学

Rate of reaction: The change in concentration of a reactant or product per unit time. Tip: 'Rate = speed of chemical transformation, measured in mol dm⁻³ s⁻¹

Published by TutorHao | Year 13 Chemistry Revision Series | aleveler.com

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