📚 Year 11 WJEC Chemistry: Rapid Memorisation Guide for Key Terms | WJEC化学：词汇术语速记指南
Success in WJEC GCSE Chemistry depends heavily on your ability to recall and apply precise scientific terminology. This rapid guide presents strategic memory aids — using word roots, visual cues, and simple analogies — to help you master the essential vocabulary for Year 11. From atomic structure to organic chemistry, each section pairs definitions with quick-association tricks. You will also find summary tables for tests and trends, making revision more efficient. The key is to link each term to a mental image or a mini-story: once the connection is made, the exam becomes far less intimidating.
在 WJEC GCSE 化学中取得好成绩，很大程度上取决于你能否准确回忆并运用科学术语。本速记指南提供策略性记忆辅助——利用词根、视觉线索和简单类比——帮助你掌握 Year 11 必背词汇。从原子结构到有机化学，每一节都为定义搭配了快速联想技巧。文中还有测试与趋势的总结表格，让复习更高效。关键是把每个术语与一个画面或小故事挂钩：一旦建立了联系，考试就不会那么可怕了。
1. Atomic Structure | 原子结构术语速记
Atom: the smallest particle of an element that can exist. Think of it as a tiny marble that cannot be cut into smaller pieces by chemical means.
原子：元素能存在的最小粒子。可把它想象成一颗不能通过化学方法再切分的小弹珠。
oton: a subatomic particle with a relative charge of +1, found in the nucleus. Memory tip: 'Pro' sounds like 'Positive', so proton = positive.
质子：相对电荷为 +1 的亚原子粒子，位于原子核内。记忆要点：'Pro' 谐音 'Positive'，所以质子带正电。
Neutron: a subatomic particle with no charge, also in the nucleus. Memory aid: 'Neutron' begins like 'Neutral'.
中子：不带电荷的亚原子粒子，同样在原子核里。记忆辅助：'Neutron' 开头像 'Neutral'，表示中性。
tomic particle with a relative charge of -1, moving in shells around the nucleus. Remember 'Electron = Electricity', because moving electrons create current.
电子：相对电荷为 -1 的亚原子粒子，在核外分层运动。记住 'Electron = Electricity'，流动的电子产生电流。
Nucleus: the tiny central core of the atom, made of protons and neutrons. It contains almost all the mass. Visual cue: a dense 'nut' at the centre of a fruit.
原子核：原子微小的中心，由质子和中子组成，几乎集中了全部质量。视觉提示：好比水果中心硬实的果核。
Atomic number (Z): the number of protons in an atom. This defines the element. Zinc is Z, so think 'Z for protons'.
原子序数 (Z)：原子中质子的数目，决定了元素的种类。联想：'Z' 形状像闪电，质子的数量就是元素的身份证号。
Mass number (A): the total number of protons and neutrons. Remember 'A = All heavy particles'.
质量数 (A)：质子与中子之和。记忆方法：'A = All heavy particles'（所有重粒子）。
Isotope: atoms of the same element with the same number of protons but different numbers of neutrons. They share chemical properties but may differ in mass. For example, carbon-12 and carbon-14. Visualise 'isotopes are identical twins with slightly different weights'.
同位素：质子数相同但中子数不同的同种元素的原子。化学性质相同但质量可能不同。例如碳-12 与碳-14。想象 '同位素是一对体重略有差异的双胞胎'。
Electronic configuration: the arrangement of electrons in shells, written as 2,8,1 for sodium. Memorise the 2.8.8 rule for the first 20 elements.
电子排布：电子在壳层中的排列，例如钠写作 2,8,1。前 20 号元素遵循 2.8.8 规则。
2. Bonding & Structure | 化学键与结构词汇
Ionic bonding: the electrostatic attraction between oppositely charged ions. It occurs when a metal transfers electrons to a non-metal. Think of a 'giving' relationship — metal gives, non-metal takes.
离子键：带相反电荷的离子间的静电引力。发生在金属向非金属转移电子时。想象一种 '给予' 关系：金属给，非金属拿。
Giant ionic lattice: a regular 3D arrangement of positive and negative ions held together by ionic bonds. This structure explains high melting points and brittleness. Picture a giant castle built from alternating + and - blocks.
巨大离子晶格：正负离子通过离子键有规律地排列成的三维结构。这解释了高熔点和脆性。想象由 + 和 - 交替砌成的巨型城堡。
Covalent bonding: the sharing of electron pairs between non-metal atoms. Both partners hold on, like two children sharing a toy. A single covalent bond is one shared pair, a double bond is two shared pairs.
共价键：非金属原子之间共享电子对。双方紧抓不放，像两个小孩分享一个玩具。单键是一对共用电子，双键是两对。
Simple molecular structure: substances made of small molecules with weak intermolecular forces but strong covalent bonds within the molecule. They have low melting points. Example: ice (H₂O). Imagine weak hair ties connecting strong Lego blocks.
简单分子结构：由小分子组成，分子内有牢固的共价键，分子间只有弱的分子间作用力。熔点低。例如冰。想象用脆弱的发圈连接坚硬的乐高积木。
Giant covalent structure: a network of atoms all bonded by covalent bonds, e.g. diamond, graphite, silicon dioxide. Very high melting points. Think of a never-ending 3D web.
巨型共价结构：所有原子通过共价键连接成的网络，如金刚石、石墨、二氧化硅。熔点极高。联想一张无穷无尽的三维网。
Metallic bonding: the attraction between positive metal ions and a sea of delocalised electrons. This electron sea allows metals to conduct electricity and be malleable. Mnemonic: 'Electrons are free like fish in the ocean.'
金属键：正电荷金属离子与离域电子海之间的引力。电子海使金属能导电、有延展性。速记：'电子像海洋中的鱼一样自由'。
r atom but can move throughout the structure. They play a key role in conduction. Remember 'delocalised = detached from home'.
离域电子：不固定于某个特定原子、能在整个结构中自由移动的电子。它们是导电的关键。记住 '离域 = 离家'。
Alloy: a mixture of a metal with one or more other elements, often harder than the pure metal because the different-sized atoms disrupt the layers. Think of it as a mixed bag of marbles that cannot slide easily.
合金：金属与一种或多种其他元素的混合物，通常比纯金属更硬，因为大小不同的原子打乱了层状排列。想象一袋混合弹珠，不易滑动。
3. Chemical Formulae & Equations | 化学式与方程式
Molecular formula: the actual number of atoms of each element in a molecule, e.g. C₂H₆ for ethane. It tells you the exact composition.
分子式：分子中每种原子的实际数目，如乙烷 C₂H₆。它表明精确的组成。
Empirical formula: the simplest whole-number ratio of atoms in a compound. For ethane, the empirical formula is CH₃. Think 'empirical suggests simple'.
实验式：化合物中原子最简整数比。乙烷的实验式为 CH₃。记住 'empirical' 像 'empty'，把数字约到最简。
State symbols: (s) solid, (l) liquid, (g) gas, (aq) aqueous solution. These must be used in balanced equations for WJEC. Picture a sloth for solid, low-energy; a shark for aqueous, swimming in water.
状态符号：(s) 固态，(l) 液态，(g) 气态，(aq) 水溶液。WJEC 考试要求配平方程中必须使用。联想：固体像树懒静止，水溶液像鲨鱼在水中游。
Reactants and products: reactants are the starting substances on the left of the arrow; products are what you make on the right. Mnemonic: 'Reactants are Required, Products are Produced.'
反应物与生成物：箭头左边是起始物质，右边是生成的东西。记忆法：'反应物是需要参与的，生成物是生产出来的'。
Balanced equation: a chemical equation where the number of atoms of each element is the same on both sides. Remember 'What goes in must come out — just rearranged.'
配平方程式：每种元素的原子数在两侧都相等的化学方程式。记住 '原子不能被创造或消灭，只能重新排列'。
it for amount of substance, containing 6.02 × 10²³ particles (Avogadro constant). Think of 'mole' as a chemistry 'dozen' but far larger. Mass (g) = moles × molar mass.
摩尔：物质的量的单位，包含 6.02 × 10²³ 个粒子（阿伏伽德罗常数）。把摩尔想象成化学里的 '一打'，只是巨大无比。质量 (g) = 摩尔数 × 摩尔质量。
s at top, moles × molar mass on bottom; or moles at top, concentration × volume on bottom.
浓度：单位 mol/dm³ 或 g/dm³，C = n/V。回忆三角关系：摩尔数在顶，浓度 × 体积在底。
| Formula concept | Relationship | Memory tip |
|---|---|---|
| Moles from mass | moles = mass / Mᵣ | 'Mass over Mᵣ' |
| Moles from solution | moles = conc × vol (dm³) | 'CV' — Curriculum Vitae but litres! |
公式概念 | 关系 | 记忆提示：摩尔从质量 = 质量/Mᵣ；摩尔从溶液 = 浓度*体积。
4. Acids, Bases & pH | 酸碱与pH
Acid: a substance that releases H⁺ ions in aqueous solution. Common lab acids are HCl, H₂SO₄, HNO₃. Remember 'Acid Adds H⁺'.
酸：在水溶液中释放 H⁺ 离子的物质。常用实验酸有 HCl、H₂SO₄、HNO₃。记住 '酸会释放 H⁺'。
metal hydroxides are bases. Alkali: a soluble base that releases OH⁻ ions in water. Think 'Alkali = Aqueous base with OH⁻'.
碱：能中和酸生成盐和水的物质。金属氧化物和氢氧化物是碱。碱（Alkali）：可溶性碱，在水中释放 OH⁻ 离子。联想 'Alkali = 含 OH⁻ 的可溶碱'。
alkaline a solution is, from 0 (strongly acidic) to 14 (strongly alkaline); 7 is neutral. 'pH = power of Hydrogen'.
pH 标度：衡量溶液酸碱性的尺度，0 为强酸，14 为强碱，7 为中性。'pH = power of Hydrogen'。
g the acid suffix: chloride from hydrochloric, sulfate from sulfuric, nitrate from nitric.
中和反应：H⁺ + OH⁻ → H₂O。核心反应：酸 + 碱 → 盐 + 水。命名盐时注意酸根：盐酸产氯化物，硫酸产硫酸盐，硝酸产硝酸盐。
Indicator: a substance that changes colour with pH. Litmus: red in acid, blue in alkali. Phenolphthalein: colourless in acid, pink in alkali. Methyl orange: red in acid, yellow in alkali. Memorise with a traffic-light pattern: acid red, neutral/alkali yellow-green-blue.
指示剂：随 pH 变色的物质。石蕊：酸中红，碱中蓝。酚酞：酸中无色，碱中粉红。甲基橙：酸中红，碱中黄。按交通灯记忆：酸红，中/碱黄绿蓝。
Universal indicator: a mixture of dyes that gives a spectrum of colours from red (pH 0-2) through green (pH 7) to purple (pH 14). 'Universal covers the whole rainbow.'
通用指示剂：混合染料，从红（pH 0-2）经绿（pH 7）到紫（pH 14）显示全色谱。'通用指向整条彩虹'。
5. Redox & Electrolysis | 氧化还原与电解
Oxidation: loss of electrons. Reduction: gain of electrons. Use the classic mnemonic OIL RIG: Oxidation Is Loss, Reduction Is Gain.
氧化：失去电子。还原：得到电子。用经典口诀 OIL RIG：氧化是失电子，还原是得电子。
Redox: a reaction where both oxidation and reduction occur simultaneously. One species is oxidised, another is reduced. Think of 'red-ox' as a two-sided coin.
氧化还原反应：氧化与还原同时发生的反应。一种物质被氧化，另一种被还原。把 'red-ox' 看作一枚双面硬币。
Oxidising agent: a substance that accepts electrons and gets reduced. Reducing agent: a substance that donates electrons and gets oxidised. 'The agent does the opposite to itself.'
氧化剂：接受电子、自身被还原的物质。还原剂：给出电子、自身被氧化的物质。'剂自身发生相反的变化'。
Electrolysis: the process of using a direct electric current to drive a non-spontaneous chemical reaction. An electrolyte is the ionic compound that conducts electricity when molten or dissolved. Picture a forced divorce of ions.
电解：利用直流电驱动非自发化学反应的过程。电解质是熔融或溶于水时导电的离子化合物。想象离子被强迫分开。
Anode: the positive electrode, where oxidation takes place. Anions (negative ions) are attracted here. Memory: 'Anode, Anions, Attraction — all start with A', and oxidation at anode.
阳极：正电极，发生氧化反应。阴离子（负离子）被吸向阳极。记忆：'阳极 Anode，阴离子 Anion，都带 A，阳极氧化'。
Cathode: the negative electrode, where reduction takes place. Cations (positive ions) move to the cathode. 'Cathode, Cations, Reduction — C and R paired.'
阴极：负电极，发生还原反应。阳离子移向阴极。'Cathode 和 Cations 带头字母 C，还原 Reduction'。
n: an equation showing electron transfer, e.g. Cu²⁺ + 2e⁻ → Cu. Make sure charges balance. 'Show the electron story for one species.'
半方程式：表示电子转移的方程式，如 Cu²⁺ + 2e⁻ → Cu。确保电荷平衡。'单独讲述一种物质的电子故事'。
6. Rates of Reaction & Energy | 反应速率与能量
Rate of reaction: the change in amount of reactant or product per unit time. Measured as cm³/s or g/s. To speed up a reaction, increase concentration, temperature, surface area or use a catalyst.
反应速率：单位时间内反应物或生成物量的变化。单位可为 cm³/s 或 g/s。要加快反应，可提高浓度、温度、表面积或使用催化剂。
Collision theory: for a reaction to occur, particles must collide with sufficient energy (activation energy) and correct orientation. Visualise bumper cars — only strong, well-aimed hits cause a reaction.
碰撞理论：要发生反应，粒子必须碰撞且能量足够（达到活化能）并取向正确。想象碰碰车——只有力度够、角度准的撞击才能引发反应。
Activation energy (Eₐ): the minimum energy required for a reaction to start. A catalyst lowers this energy, providing an alternative pathway.
活化能 (Eₐ)：引发反应所需的最小能量。催化剂降低活化能，提供一条替代路径。
Catalyst: a substance that speeds up a reaction without being used up. It is chemically unchanged at the end. Mnemonic: 'Catalog helps but stays on the shelf.'
催化剂：加速反应而自身不被消耗的物质，化学上保持不变。记忆：像图书目录，帮助查询但不改变自身。
combustion, neutralisation. The energy profile shows products lower than reactants. Think 'exo = exit energy'.
放热反应：释放能量（通常为热）的反应，环境温度升高。例如燃烧、中和。能量曲线图中生成物低于反应物。记住 'exo = 能量出口'。
ngs, causing a temperature drop. Thermal decomposition and photosynthesis are endothermic. 'Endo = energy enters'.
吸热反应：从环境吸收能量的反应，导致温度下降。热分解和光合作用是吸热的。'Endo = 能量进入'。
Bond energy: the energy needed to break a bond or the energy released when a bond is formed. Bond breaking is endothermic, bond making is exothermic. Remember 'Breaking requires energy, Making gives it out'.
键能：断裂或形成化学键涉及的能量。断键吸热，成键放热。记住 '断键要能量，成键放能量'。
onds broken - sum of bonds made. A neat way to check if a reaction is exo- or endothermic.
总能量变化 = 断键总能 - 成键总能。可用这个差值判断放热还是吸热。
7. Organic Chemistry Basics | 有机化学基础
only single C-C bonds (alkanes). Unsaturated have at least one C=C double bond (alkenes). 'Saturated = full of hydrogen, no double bonds.'
烃：只含碳和氢的化合物。饱和烃只有碳碳单键（烷烃），不饱和烃至少有一个 C=C 双键（烯烃）。'饱和 = 氢满，无双键'。
Homologous series: a family of organic compounds with the same functional group and general formula, each successive member differing by CH₂. Trends in physical properties are smooth. Visualise a staircase where each step adds a CH₂ brick.
同系物：具有相同官能团和通式的有机物家族，每相邻成员相差一个 CH₂。物理性质呈现递变。想象楼梯，每一级加一块 CH₂ 砖。
series its characteristic reactions. Alkenes: C=C; alcohols: -OH; carboxylic acids: -COOH. 'Focus on the reactive handle.'
官能团：赋予一系列有机物特征反应的原子或原子团。烯烃：C=C；醇：-OH；羧酸：-COOH。'重点关注这个反应手柄'。
Alkane: CₙH₂ₙ₊₂, named with suffix -ane. Methane, ethane, propane, butane. They are generally unreactive but burn and can undergo substitution in UV light.
烷烃：通式 CₙH₂ₙ₊₂，以 -ane 结尾。甲烷、乙烷、丙烷、丁烷。通常不活泼，但能燃烧并在紫外光下发生取代反应。
ond makes them more reactive. They undergo addition reactions and turn bromine water from orange to colourless. 'Test for unsaturation: bromine water decolourises.'
烯烃：通式 CₙH₂ₙ，以 -ene 结尾。C=C 双键使其更活泼。发生加成反应，能使溴水从橙色变为无色。'不饱和度检验：溴水褪色'。
Addition polymerisation: many monomer molecules (alkenes) join together by opening double bonds to form a long saturated chain — a polymer. No other product is formed. Example: poly(ethene) from ethene. 'Molecules holding hands in a long chain.'
加成聚合：许多单体分子（烯烃）打开双键，连成长长的饱和链——聚合物。无其他副产物。例如乙烯聚合成聚乙烯。'分子手拉手排长队'。
Alcohol: contain -OH group; general formula CₙH₂ₙ₊₁OH. Ethanol (C₂H₅OH) can be made by fermentation or hydration of ethene. Combustible, soluble, used as fuels and solvents.
醇：含 -OH 基团；通式 CₙH₂ₙ₊₁OH。乙醇可通过发酵或乙烯水合法制得。可燃、可溶，用作燃料和溶剂。
Carboxylic acid: contain -COOH group. Weak acids, partially ionise in water. Vinegar is dilute ethanoic acid. React with alcohols to form esters. 'COOH looks like a cool face with two eyes.'
羧酸：含 -COOH 基团。弱酸，在水中部分电离。食醋是稀乙酸。与醇反应生成酯。'COOH 像一张有两眼的酷脸'。
8. Chemical Analysis | 化学分析术语
Flame test: used to identify metal ions based on the colour they impart to a Bunsen flame. Clean a nichrome wire in HCl, dip in sample and observe. Lithium: crimson; Sodium: yellow; Potassium: lilac; Calcium: brick red; Copper: green. Memory: 'Little Naughty Children Prefer Cola': Li crimson, Na yellow, Ca brick red, Cu green, K lilac.
焰色试验：根据金属离子在本生灯火焰中呈现的颜色来鉴定。用稀盐酸清洗镍铬丝，蘸取样品观察。锂：深红；钠：黄；钾：紫；钙：砖红；铜：绿。记忆口诀：'李红、钠黄、紫钾、钙砖、铜绿'。
| Metal ion | Flame colour | Mnemonics
Published by TutorHao | Year 11 Chemistry Revision Series | aleveler.com 广告 / Sponsored Pearson Chemistry for the IB Diploma Programme Standard Lev… 化学 备考教辅 · 正版现货 · 与本文内容相关 查看详情 / View on Taobao参考价 ¥524.0更多咨询请联系16621398022（同微信） 备考资讯每日更新，关注不错过 考纲变化 · 科目分析 · 学习方法  在微信里长按二维码识别关注 或截图后用「扫一扫 → 相册」选择本图 公众号：tutorhao |
|---|