化学 CBE — Practice Tests & Mock Exams

原子结构、化学键、反应、化学计量、气体定律、溶液和热化学。覆盖TEKS §112.35。

Built for the Texas CBE — also used by Algebra 1 students in 9 states and 5 countries
Semester A

50 questions · 180 min · 80% to pass

Free Practice (10)
Semester B

50 questions · 180 min · 80% to pass

Free Practice (10)
Free practice gives instant feedback. Sign up for full mock exams.
Already took a free practice? Here's what your score means.
85%+ cold
You're likely ready for the official 化学 Credit by Examination. Register with your counselor and take 1–2 full timed mocks to lock it in.
70–85%
Solid foundation, real prep needed. 4–6 weeks of timed mocks ($19.99 / 6 mo) with AI explanations on every wrong answer.
Under 70%
Concept-level gaps. Start with the Concept Lessons below, then return to practice once the underlying topic clicks.

Passing-score thresholds vary by district (Texas state code: 80% for §28.023 acceleration, 70% for §74.24 prior-instruction credit). Confirm your specific district's threshold with your school counselor in writing.

Learn the Concepts

Visual lessons that build 化学 from first principles — diagrams, worked examples, embedded practice.

Concept Lesson · 10 min· TEKS 5A,7A,8A,9A,10A
化学 核心概念

周期趋势、化学键、化学计量、气体定律、酸碱化学。

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Concept Lesson · 7 min· TEKS 1A,2A,3F
Lab Safety & the Scientific Method

Before you mix anything: master the safety rules and the experimental mindset that every CBE question tests. Hypotheses vs theories, controls, sig figs, and the everyday gear that keeps the lab safe.

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Concept Lesson · 8 min· TEKS 4A,4B,4C
Matter: States, Properties, and Why It All Changes

Solid, liquid, gas — and the difference between a physical and chemical change. Mass conservation, mixtures vs pure substances, and the 5 major reaction types every CBE student must recognize on sight.

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Concept Lesson · 7 min· TEKS 5A,5B,5C
Reading the Periodic Table: Trends That Predict Everything

The periodic table isn't a list — it's a predictive engine. Groups, periods, blocks, and the four major trends (atomic radius, ionization energy, electronegativity, metallic character) that the CBE leans on heavily.

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Concept Lesson · 8 min· TEKS 6A,6B,6C
Atoms: Subatomic Particles & Electron Configuration

Protons, neutrons, electrons — and the rules that govern where electrons live. Isotopes, the Bohr model, modern orbitals, and how to write the configuration of any element you'll see on the CBE.

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Concept Lesson · 9 min· TEKS 7A,7B,7C,7E
Chemical Bonding: Ionic, Covalent, and Molecular Shapes

Why do atoms bond at all? Ionic, covalent, and metallic bonding compared — plus Lewis structures, polarity, VSEPR shapes, and the intermolecular forces that make water wet.

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What's on the 化学 CBE

Every TEKS standard the official exam covers — and the exact topics our practice questions target.

SEMESTER ATEKS 1A–6E
  • 1A-3FScientific Processes and Methods
  • 4A-4DMatter
  • 5A-5CPeriodic Table and Periodicity
  • 6A-6EAtoms
  • 7A-7EChemical Bonds
SEMESTER BTEKS 7A–11D
  • 8A-8FThe Mole and Stoichiometry
  • 9A-9DSolutions
  • 10A-10DGases
  • 11A-11DThermochemistry
  • 12A-12CNuclear Chemistry

化学 CBE — Common Questions

化学 CBE 考试涵盖哪些主题?

化学 CBE 涵盖科学过程与实验室安全、原子结构、周期表与周期性、化学键、化学反应与方程式、化学计量、气体定律与溶液、热化学以及核化学入门。TEKS §112.35 中每个报告类别都会在 A 学期和 B 学期的模拟考试中均匀抽样。

化学 CBE 难度如何?

考试包含概念记忆(原子结构、化学键类型、周期性趋势)和定量解题(摩尔-质量换算、化学计量、气体定律、溶液摩尔浓度)。约 30–40% 的题目是计算题。在我们的模拟考试中得 80% 以上的学生通常首次参加正式考试就能通过。

化学 CBE 考试时长多少?

考试约 3 小时,约 50–55 道题。我们的模拟考试在长度和题型分布上完全相同——概念题、基于示意图的题(原子模型、相图)和定量题——让你的节奏练习更精准。

需要背下整个周期表吗?

不需要全部——但你必须熟练掌握其中的规律。CBE 考试通常会提供周期表参考资料,所以关键是读对:知道金属/非金属/类金属的位置,识别原子半径、电离能和电负性的趋势,并根据族号预测常见离子电荷。

化学 CBE 有实验部分吗?

没有实操实验,但会有实验室安全、仪器辨识、实验设计和数据解读相关的题目。约 15–20% 的题目考察科学方法理解力——对照、变量、有效数字和图表阅读。

化学 CBE 需要计算器吗?

需要——允许使用科学计算器或图形计算器,化学计量、气体定律和摩尔浓度题目都会用到。我们的练习题假定考生使用计算器,因此你可以用考试当天将使用的同一种工具来练习。

化学 CBE 的及格分数是多少?

70%——与 UT High School 的所有 CBE 考试相同。建议在全长模拟考试中争取 85% 以上,因为化学计量和气体定律计算题的难度会根据你这次考试所抽取的 TEKS 标准有较大波动。

我不在德州 — 这里的化学备考还适用吗?

适用。化学的核心内容——原子结构、周期性趋势、化学键、化学计量、气体定律、热化学——在所有州的高中化学课程和大多数国际项目中都是通用的。我们的题目对齐 TEKS,但化学本身是相同的。70% 的及格线是德州 CBE 特有的;在其他州,练习仍能培养您的课程或 AP 化学考试所测试的技能。