📚 Year 11 SQA Chemistry: Vocabulary Memorisation Guide | Year 11 SQA 化学：词汇术语速记指南
This bilingual guide is designed to help Year 11 SQA Chemistry students master essential scientific vocabulary. Each term is explained first in English, immediately followed by a Chinese translation, with memory tips woven throughout to reinforce understanding. Use this resource to build your chemical language skills and approach the SQA exam with confidence.
这份双语指南旨在帮助 Year 11 SQA 化学学生掌握核心科学词汇。每个术语先用英文解释，紧接着提供中文译文，并穿插记忆技巧来巩固理解。利用这份资料，你可以提升化学语言能力，自信应对 SQA 考试。
1. Atomic Structure and Subatomic Particles | 原子结构与亚原子粒子
Atom – The smallest part of an element that can still take part in a chemical reaction. It consists of a nucleus surrounded by electrons. Mnemonic: 'A-tom' can remind you of 'a tiny particle that cannot be cut' (Greek: atomos).
原子 – 元素中能参与化学反应的最小部分。它由一个被电子包围的原子核构成。记忆技巧：'Atom' 源于希腊语 'atomos'，意为不可分割，可以记成 “阿图姆”极小粒子。
Proton – A positively charged subatomic particle found in the nucleus. The number of protons determines the element (atomic number). Think: 'Pro' sounds like 'positive' and 'first', as it defines the element.
质子 – 原子核中带正电的亚原子粒子。质子数决定了元素的种类（原子序数）。记忆技巧：'Pro' 听起来像 'positive' 和 'priority'，因为质子定义了元素身份。
Neutron – An uncharged (neutral) subatomic particle found in the nucleus. It contributes to mass but not to charge. Memory aid: 'Neu-' is like 'neutral', and it 'neutr'-alises the protons' repulsion in the nucleus.
中子 – 原子核中不带电（呈电中性）的亚原子粒子。它贡献质量但不贡献电荷。记忆技巧：'中子'的 '中' 表示不带电，中立角色；英文 'neutron' 与 'neutral' 同源。
Electron – A negatively charged subatomic particle that orbits the nucleus in energy levels. Its arrangement dictates chemical reactivity. Remember: 'E-' for 'electricity' and 'negative'; electrons flow as current.
电子 – 带负电的亚原子粒子，在原子核外的能量层中运动。其排布决定了化学活泼性。记忆技巧：'电' 暗示电荷；英文 'electron' 含 'electric'，电子移动产生电流。
Nucleus – The dense central core of an atom containing protons and neutrons. It carries almost all the atom's mass. Visual cue: imagine a tiny 'nucleus' as a 'nut' in the center of a fruit.
原子核 – 原子致密的中央核心，包含质子和中子。它承载了几乎原子的全部质量。视觉化记忆：把 'nucleus' 想象成果实中心的 '核'，小而重。
2. The Periodic Table and Group Patterns | 周期表与族规律
Period – A horizontal row in the periodic table. Elements in the same period have the same number of occupied electron shells. Tip: 'Period' sounds like 'row of a bridge'; it goes across.
周期 – 周期表中横行。同一周期的元素拥有相同数目的已占电子层。记忆提示：'周期' 可以想成周而复始横行排列，就像桥梁的一段。
Group – A vertical column in the periodic table. Elements in the same group have the same number of outer electrons and similar chemical properties. Mnemonic: 'Group' is like a 'family' going down.
族 – 周期表中纵列。同族元素最外层电子数相同，化学性质相似。记忆技巧：族就像纵向的 '家族'，上下代性质接近。
Alkali metals (Group 1) – Very reactive metals with one outer electron, forming +1 ions. They react vigorously with water. Think: 'Alkali' water makes them 'alive' and fizzing; they are so reactive they must be stored under oil.
碱金属（第1族） – 最外层只有一个电子的极活泼金属，形成 +1 价离子。它们与水剧烈反应。记忆：遇水生碱，'碱金属' 活泼到必须泡在油里存放。
Halogens (Group 7) – Very reactive non-metals with seven outer electrons, forming −1 ions. 'Halo-' means salt; they form salts with metals. Reactivity decreases down the group.
卤素（第7族） – 最外层有七个电子的极活泼非金属，形成 −1 价离子。'卤' 指盐类；卤素与金属成盐。族内自上而下活泼性减弱。
Noble gases (Group 0) – Colourless, unreactive gases with full outer electron shells. They rarely form compounds. Think: 'Noble' as in royalty, they don't mingle easily; their outer shell is 'full' and content.
惰性气体（第0族） – 无色、不活泼的气体，最外电子层全满。它们极少形成化合物。记忆：'惰性' 如贵族般不屑反应；外层电子 '满' 了，无需得失。
3. Chemical Bonding and Structure | 化学键与结构
Ionic bond – The electrostatic attraction between oppositely charged ions, formed by electron transfer from a metal to a non-metal. Remember: 'I-onic' gives and takes, like 'I owe you', transferring electrons.
离子键 – 带相反电荷离子间的静电吸引，由金属向非金属转移电子形成。记忆：'离子' 相互欠还；金属给电子，非金属得电子，正负相吸。
Covalent bond – A shared pair of electrons between two non-metal atoms. 'Co-' means together, 'valent' relates to valence electrons. Think: sharing is caring; both atoms hold onto the electrons.
共价键 – 两个非金属原子间共用一对电子。'共' 意为一起，共享价电子。记忆技巧：共价键是共用电子的 '合作关系'。
Metallic bond – The attraction between positive metal ions and a 'sea' of delocalised electrons. This explains conductivity and malleability. Visualise: positive ions are like islands in a sea of mobile electrons.
金属键 – 正金属离子与离域电子 '海' 之间的吸引。这解释了导电性与延展性。形象记忆：正离子如小岛，被可流动的电子海洋包围。
Molecule – A group of atoms held together by covalent bonds. 'Mole' is a mass unit, but in 'molecule' think 'a tiny mass of atoms'. It is the smallest particle of a covalent compound.
分子 – 由共价键结合在一起的原子团。可以记成 '极小的粒子'，是共价化合物的最小单元。
4. Chemical Formulae and Naming | 化学式与命名
Chemical formula – A representation using element symbols and subscript numbers to show the types and ratios of atoms in a compound. For SQA, master prefixes like 'mono-', 'di-', 'tri-'.
化学式 – 用元素符号和下标数字表示化合物中各原子种类与比例的式子。SQA 考试需掌握 '一'、'二'、'三' 等前缀。
Valency – The combining power of an atom, measured by the number of bonds it can form. It often matches the charge in an ion. Mnemonic: 'Valency' is like 'capacity' – how many arms an atom has to hold others.
化合价 – 原子的结合能力，以它能形成的化学键数目来衡量。常与离子电荷一致。记忆：化合价就像原子的 '手' 数，能拉几个伙伴。
Compound – rom its constituent elements. Think: 2 elements combined = compound interest in chemistry.
化合物 – 由两种或两种以上不同元素通过化学键结合而成的物质。化合物的性质与其组成元素迥异。记忆：化合而成的 '复合' 物。
Balancing equations – Adjusting coefficients to ensure the number of atoms of each element is the same on both sides of the arrow. SQA tip: balance oxygen last, and never change subscripts.
配平方程式 – 调整系数使箭头两边各元素的原子数目相等。SQA 技巧：最后配平氧，切勿改动下标数字。
5. The Mole and Quantitative Chemistry | 摩尔与定量化学
Mole – The unit for amount of substance, containing 6.02 × 10²³ particles (Avogadro's constant). One mole of any substance has a mass = formula mass in grams. Think: 'A mole of molecules' – a huge number, just as a mole animal digs many tunnels.
摩尔 – 物质的量的单位，含有 6.02 × 10²³ 个粒子（阿伏伽德罗常数）。1 摩尔任何物质的质量 = 以克为单位的式量。记忆：'摩尔' 就像很多很多的 '颗粒'，数量惊人。
Gram formula mass (GFM) – found by adding relative atomic masses. GFM is used in stoichiometric calculations. Think: 'GFM' = 'grams for a mole'.
克式量 (GFM) – 一摩尔化合物的质量，由相对原子质量相加得到。克式量用于化学计量计算。记法：GFM = '给摩尔称的克数'。
Concentration – The amount of solute dissolved in a given volume of solution, often expressed in mol l⁻¹. Use the formula: concentration = moles ÷ volume (litres). Mnemonic: 'Concentrated' is 'more moles in less space'.
浓度 – 单位体积溶液中溶解的溶质数量，常用 mol l⁻¹ 表示。公式：浓度 = 摩尔数 ÷ 体积（升）。记忆：浓度就像 '拥挤度'，一定容积里摩尔越多越浓。
Limiting reactant – The substance that is completely used up first in a reaction, determining the amount of product formed. SQA often asks to identify it. Mnemonic: The reactant that 'limits' the party because it runs out first.
限量反应物 – 在反应中最先消耗尽的物质，决定了产物的多少。SQA 常考如何辨认。记忆：率先用完的那个，'限制' 了反应的进行。
6. Acids, Bases and the pH Scale | 酸、碱与 pH 标度
Acid – A substance that produces hydrogen ions (H⁺) in water. Common lab acids: hydrochloric (HCl), sulfuric (H₂SO₄). Mnemonic: 'Acid' starts with 'A' for 'adding H⁺' and tastes sour.
酸 – 在水中产生氢离子 (H⁺) 的物质。常见实验室酸：盐酸 (HCl)、硫酸 (H₂SO₄)。记忆：酸味联想，且 '酸' 字本身带 '夋'，想象释放 H⁺。
Base – id to form a salt and water. Soluble bases are called alkalis and produce OH⁻ ions. Think: 'Base' = 'basic' neutraliser; alkaline is 'al-kali', similar to 'alkali' metals' oxides.
碱 – 能中和酸生成盐和水的物质。可溶碱称为 '强碱'，产生 OH⁻ 离子。记忆：碱是酸的反义词，像 '地基' 一样中和酸性。
Neutralisation – and water only. It is an exothermic process. Equation pattern: acid + base → salt + water.
中和反应 – 酸与碱反应只生成盐和水。为放热过程。通用方程式：酸 + 碱 → 盐 + 水。记忆：正负相消，归于中和。
pH scale – ral, pH > 7 alkaline. SQA tip: Universal indicator shows colour progress across the scale.
pH 标度 – 从 0 到 14 衡量溶液酸碱性的标尺。pH < 7 酸性，pH = 7 中性，pH > 7 碱性。用通用指示剂可观测颜色变化；SQA 必考配色。
7. Electrochemistry and Redox | 电化学与氧化还原
Electrolysis – The breaking down of an ionic compound using direct current electricity. 'Electro-' refers to electricity, '-lysis' means splitting. Remember: it splits compounds by electricity.
电解 – 用直流电将离子化合物分解的过程。'电' 指电流，'解' 指分解。记忆：电流使化合物 '解离' 为元素。
Oxidation – Originally meant gain of oxygen; now defined as loss of electrons. In a redox reaction, oxidation and reduction happen together. Use OIL RIG: Oxidation Is Loss of electrons.
氧化 – 原指得氧，现定义为失电子。在氧化还原反应中，氧化与还原同时发生。口诀 OIL RIG：氧化是失电子（Oxidation Is Loss）。
Reduction – The gain of electrons. It often involves loss of oxygen or gain of hydrogen. RIG: Reduction Is Gain. In SQA, link to extracting metals from their oxides.
还原 – 得到电子。常伴有失氧或得氢。RIG 记忆：还原是得电子（Reduction Is Gain）。SQA 中联系金属氧化物提炼金属。
Electrochemical series – A list of metals (and hydrogen) in order of their tendency to form ions. A more reactive metal will displace a less reactive one from a solution. Memory: The series shows which metal 'wants' to be an ion most.
电化序 – 按金属（及氢）形成离子倾向排列的顺序。活泼性强的金属能从溶液中置换出活泼性弱的金属。记忆：序列表就是金属 '争当离子' 的好胜榜。
8. Organic Chemistry: Hydrocarbons and Fuels | 有机化学：碳氢化合物与燃料
Hydrocarbon – A compound containing only carbon and hydrogen atoms. Alkanes and alkenes are two key families. Think 'hydro' (hydrogen) + 'carbon'.
碳氢化合物 – 只含碳和氢原子的化合物。烷烃和烯烃是两大主要家族。记忆：碳、氢直接组合成 '烃'。
Alkane – A saturated hydrocarbon with single bonds and the general formula CₙH₂ₙ₊₂. 'Saturated' means maximum hydrogens. Methane (CH₄) is the simplest. Mnemonic: 'Alkane' ends with '-ane' for single bond 'ane-mic' (weak link).
烷烃 – 单键结合的饱和碳氢化合物，通式 CₙH₂ₙ₊₂。'饱和' 意为氢最多。甲烷 (CH₄) 是最简。记忆：烷的 '-ane' 像 '贫血' 一样单薄，所以是单键。
Alkene – ne C=C double bond and general formula CₙH₂ₙ. Alkenes decolourise bromine water. Remember: 'ene' sounds like 'double en-ergy', two lines.
烯烃 – 不饱和碳氢化合物，至少含一个 C=C 双键，通式 CₙH₂ₙ。烯烃使溴水褪色。记忆：'烯' 字含 '希'，缺氢；双键隐含着双杠 '='。
Fuel – e CO₂ and H₂O. Complete combustion: fuel + O₂ → CO₂ + H₂O. Incomplete may form CO (toxic).
燃料 – 燃烧释放可利用能量的物质。碳氢化合物与氧反应生成 CO₂ 和 H₂O。完全燃烧：燃料 + O₂ → CO₂ + H₂O。不完全燃烧可能产生有毒 CO。
9. Reaction Rates and Energy Changes | 反应速率与能量变化
Rate of reaction – e, concentration, particle size, and catalysts. Formula: rate = change in quantity ÷ time.
反应速率 – 反应物转化为产物的快慢。影响因素有温度、浓度、颗粒大小和催化剂。公式：速率 = 量的变化 ÷ 时间。
Catalyst – A substance that speeds up a reaction without being used up. It lowers the activation energy. Mnemonic: 'Catalyst' is like a 'catapult' that helps particles over the energy barrier but remains unchanged.
催化剂 – 加快反应自身却不被消耗的物质。它降低活化能。记忆：催化剂像 '弹射器'，帮反应物跃过能垒而全身而退。
Exothermic – A reaction that releases heat to the surroundings; temperature rises. Bond making is exothermic. Think 'ex' means exit, heat exits. Examples: combustion, neutralisation.
放热反应 – 向环境释放热量的反应，温度升高。键形成是放热的。记忆：'ex' 为向外，热量 'exit'。例如燃烧和中和。
Endothermic – A reaction that absorbs heat from the surroundings; temperature falls. Bond breaking is endothermic. 'Endo' means inside; heat goes in. Example: thermal decomposition.
吸热反应 – 从环境吸收热量的反应，温度下降。键断裂是吸热的。'endo' 意为向内，热量 '入内'。例：热分解。
Energy profile: Exothermic has lower product energy; Endothermic has higher product energy.
能量图：放热反应产物质能量更低；吸热反应产物质能量更高。
10. Chemical Analysis and Instrumental Methods | 化学分析与仪器方法
Precipitate – An insoluble solid formed when two solutions react. Qualitative analysis often uses precipitation to identify ions. 'Precipitate' reminds us of 'precipitation' (rain) – solid falls out of solution.
沉淀 – 两种溶液反应时生成的不溶固体。定性分析常用沉淀反应鉴定离子。'沉淀' 犹如雨水落下，固体从溶液中析出。
Flame test – A method to identify metal ions by the characteristic colour they produce in a Bunsen flame. Lithium: red; sodium: yellow; potassium: lilac; copper: blue-green. Mnemonic: ring a 'colourful alarm' to recall unique colours.
焰色试验 – 通过金属离子在本生灯火焰中产生的特征颜色来鉴别的方法。锂红、钠黄、钾紫、铜蓝绿。记忆：把颜色光谱想象成'金属身份证'。
Chromatography – A separation technique that distributes components between a stationary phase and a mobile phase. Rf values help identify substances. 'Chroma- means colour; graphy means writing – writing with colours.
色谱法 – 利用组分在固定相和流动相间分配差异进行分离的技术。比移值 Rf 帮助鉴定物质。记法：'色' 代表颜色，'谱' 代表图谱，画出彩色谱带。
Titration – A quantitative technique used to find the concentration of an acid or alkali by neutralisation. A burette and indicator (like phenolphthalein) are used. Note the endpoint is when the indicator changes colour.
滴定 – 利用中和反应求解酸或碱浓度的定量技术。使用滴定管和指示剂（如酚酞）。终点即指示剂变色瞬间。记忆：一滴一滴加入，直至'滴'到终点。
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