CHEM 20AHChemical Structure (Honors)

Chemistry and Biochemistry · 4 units · Undergraduate lower division (0-99)

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Honors course parallel to course 20A.

P/NP or letter grading.

When it runs

Fall 2025
Fall 2026

Scheduled, not typical — from UCLA’s Schedule of Classes, which publishes Fall 2025 through Spring 2027 and nothing before it.

Requisites

Official UCLA wording
Preparation: high school chemistry or equivalent background, high school physics, and three and one half years of high school mathematics. Enforced corequisite: Mathematics 31A.

BruinTree reads · Preparation

needs reviewconfidence 0.00 · from text

BruinTree could not read this requirement — see UCLA’s wording above.

· could not read "high school chemistry" (no course number found)
· could not read "equivalent background" (no course number found)
· could not read "high school physics" (no course number found)
· could not read "three" (no course number found)
· could not read "one half years of high school mathematics" (no course number found)
· no course reference could be read from this requisite

BruinTree reads · Corequisite

confidence 1.00 · from text

MATH 31A

Requires

Everything that has to come before this course, not just the courses named in the requisite above.

CHEM 20AH

MATH 31ADifferential and Integral Calculus
- MATH 1Precalculus

1 direct requisite. The whole upstream is here — 2 courses over 2 levels. Every course here opens its own tree.

Unlocks

What this course is a requisite for, and what those courses lead to in turn.

CHEM 20AH

CHEM 14BGeneral Chemistry for Life Scientists II3 more beyond
- CHEM 14BLGeneral and Organic Chemistry Laboratory Ianother path to it
- CHEM 14CStructure of Organic Molecules10 more beyond
  - CHEM 14CLGeneral and Organic Chemistry Laboratory IIanother path to it
  - CHEM 14DOrganic Reactions and Pharmaceuticals7 more beyond
- A&O SCI 104Fundamentals of Air and Water Pollution
  - A&O SCI 112Climate Change Assessment1 more beyond
- CHEM 14CLGeneral and Organic Chemistry Laboratory IIanother path to it
- CHEM 20LGeneral Chemistry Laboratoryanother path to it
- EPS SCI CM173Earth Process and Evolutionary History
- A&O SCI 141Introduction to Atmospheric Chemistry and Air Pollution
- EE BIOL CM173Earth Process and Evolutionary History
CHEM 14BEGeneral Chemistry for Life Scientists II—Enhanced
- CHEM 14CLGeneral and Organic Chemistry Laboratory II
  - CHEM 192AUndergraduate Practicum in Chemistry and Biochemistryanother path to it
  - CHEM 192BUndergraduate Practicum in Chemistry and Biochemistryanother path to it
- CHEM 110APhysical Chemistry: Chemical Thermodynamicsanother path to it
CHEM 14BLGeneral and Organic Chemistry Laboratory I
- CHEM 14CLGeneral and Organic Chemistry Laboratory IIanother path to it
- CHEM 153LBiochemical Methods I4 more beyond
  - CHEM 103Environmental Chemistryanother path to it
  - CHEM C150Research Integrity and Methods in Cellular Biology, Molecular Biology, and Biochemistry Research
- EE BIOL 148Biology of Marine Plants
- CHEM 192AUndergraduate Practicum in Chemistry and Biochemistry
- CHEM 192BUndergraduate Practicum in Chemistry and Biochemistry
- PHYSCI 166Animal Physiology
  - EE BIOL 106Experimental Marine Invertebrate Biology
CHEM 20BChemical Energetics and Change29 more beyond
- CHEM 14CLGeneral and Organic Chemistry Laboratory IIanother path to it
- CHEM 20LGeneral Chemistry Laboratory16 more beyond
  - CHEM 14CLGeneral and Organic Chemistry Laboratory IIanother path to it
  - CHEM 30ALGeneral Chemistry Laboratory IIanother path to it
- A&O SCI 104Fundamentals of Air and Water Pollutionanother path to it
- CHEM 30AOrganic Chemistry I: Structure and Reactivity15 more beyond
  - CHEM 30ALGeneral Chemistry Laboratory IIanother path to it
  - CHEM 30BOrganic Chemistry II: Reactivity, Synthesis, and Spectroscopy13 more beyond
- CHEM 30ALGeneral Chemistry Laboratory II3 more beyond
  - CHEM 30BLOrganic Chemistry Laboratory I2 more beyond
  - CHEM 114Physical Chemistry Laboratoryanother path to it
- BIOENGR C104Physical Chemistry of Biomacromolecules
  - BIOENGR C107Polymer Chemistry for Bioengineers
- CHEM 110APhysical Chemistry: Chemical Thermodynamicsanother path to it
- CHEM 113APhysical Chemistry: Introduction to Quantum Mechanics23 more beyond
  - CHEM 110BTopics in Physical Chemistryanother path to it
  - CHEM C113BQuantum Chemistry Methods
CHEM 50Computational Tools for Materials Modeling and Discovery
CHEM 110APhysical Chemistry: Chemical Thermodynamics19 more beyond
- CHEM 103Environmental Chemistry
- CHEM 110BTopics in Physical Chemistry9 more beyond
  - CHEM 114Physical Chemistry Laboratoryanother path to it
  - CHEM 114HPhysical Chemistry Laboratory (Honors)another path to it
- MAT SCI 131Diffusion and Diffusion-Controlled Reactions4 more beyond
  - MAT SCI 131LDiffusion and Diffusion-Controlled Reactions Laboratory
  - MAT SCI 132Structure and Properties of Metallic Alloys2 more beyond
- CHEM 114Physical Chemistry Laboratory
- CHEM 114HPhysical Chemistry Laboratory (Honors)
- PHYSICS 144Polymer Physics
- CHEM 118Colloidal Dynamics Laboratory
- CHEM C123AAdvanced Thermodynamics and Statistical Mechanics with Laboratory I
  - CHEM C123BAdvanced Thermodynamics and Statistical Mechanics with Laboratory II

6 courses list this as a requisite. Showing 60 courses over 3 levels; the branches marked with a count carry on past it. Every course here opens its own tree.

Requisites

Official UCLA wording

Preparation: high school chemistry or equivalent background, high school physics, and three and one half years of high school mathematics. Enforced corequisite: Mathematics 31A.

BruinTree reads · Preparation

needs reviewconfidence 0.00 · from text

BruinTree could not read this requirement — see UCLA’s wording above.

· could not read "high school chemistry" (no course number found)
· could not read "equivalent background" (no course number found)
· could not read "high school physics" (no course number found)
· could not read "three" (no course number found)
· could not read "one half years of high school mathematics" (no course number found)
· no course reference could be read from this requisite

BruinTree reads · Corequisite

confidence 1.00 · from text

MATH 31A

Unlocks

What this course is a requisite for, and what those courses lead to in turn.

CHEM 20AH

CHEM 14BGeneral Chemistry for Life Scientists II3 more beyond
- CHEM 14BLGeneral and Organic Chemistry Laboratory Ianother path to it
- CHEM 14CStructure of Organic Molecules10 more beyond
  - CHEM 14CLGeneral and Organic Chemistry Laboratory IIanother path to it
  - CHEM 14DOrganic Reactions and Pharmaceuticals7 more beyond
- A&O SCI 104Fundamentals of Air and Water Pollution
  - A&O SCI 112Climate Change Assessment1 more beyond
- CHEM 14CLGeneral and Organic Chemistry Laboratory IIanother path to it
- CHEM 20LGeneral Chemistry Laboratoryanother path to it
- EPS SCI CM173Earth Process and Evolutionary History
- A&O SCI 141Introduction to Atmospheric Chemistry and Air Pollution
- EE BIOL CM173Earth Process and Evolutionary History
CHEM 14BEGeneral Chemistry for Life Scientists II—Enhanced
- CHEM 14CLGeneral and Organic Chemistry Laboratory II
  - CHEM 192AUndergraduate Practicum in Chemistry and Biochemistryanother path to it
  - CHEM 192BUndergraduate Practicum in Chemistry and Biochemistryanother path to it
- CHEM 110APhysical Chemistry: Chemical Thermodynamicsanother path to it
CHEM 14BLGeneral and Organic Chemistry Laboratory I
- CHEM 14CLGeneral and Organic Chemistry Laboratory IIanother path to it
- CHEM 153LBiochemical Methods I4 more beyond
  - CHEM 103Environmental Chemistryanother path to it
  - CHEM C150Research Integrity and Methods in Cellular Biology, Molecular Biology, and Biochemistry Research
- EE BIOL 148Biology of Marine Plants
- CHEM 192AUndergraduate Practicum in Chemistry and Biochemistry
- CHEM 192BUndergraduate Practicum in Chemistry and Biochemistry
- PHYSCI 166Animal Physiology
  - EE BIOL 106Experimental Marine Invertebrate Biology
CHEM 20BChemical Energetics and Change29 more beyond
- CHEM 14CLGeneral and Organic Chemistry Laboratory IIanother path to it
- CHEM 20LGeneral Chemistry Laboratory16 more beyond
  - CHEM 14CLGeneral and Organic Chemistry Laboratory IIanother path to it
  - CHEM 30ALGeneral Chemistry Laboratory IIanother path to it
- A&O SCI 104Fundamentals of Air and Water Pollutionanother path to it
- CHEM 30AOrganic Chemistry I: Structure and Reactivity15 more beyond
  - CHEM 30ALGeneral Chemistry Laboratory IIanother path to it
  - CHEM 30BOrganic Chemistry II: Reactivity, Synthesis, and Spectroscopy13 more beyond
- CHEM 30ALGeneral Chemistry Laboratory II3 more beyond
  - CHEM 30BLOrganic Chemistry Laboratory I2 more beyond
  - CHEM 114Physical Chemistry Laboratoryanother path to it
- BIOENGR C104Physical Chemistry of Biomacromolecules
  - BIOENGR C107Polymer Chemistry for Bioengineers
- CHEM 110APhysical Chemistry: Chemical Thermodynamicsanother path to it
- CHEM 113APhysical Chemistry: Introduction to Quantum Mechanics23 more beyond
  - CHEM 110BTopics in Physical Chemistryanother path to it
  - CHEM C113BQuantum Chemistry Methods
CHEM 50Computational Tools for Materials Modeling and Discovery
CHEM 110APhysical Chemistry: Chemical Thermodynamics19 more beyond
- CHEM 103Environmental Chemistry
- CHEM 110BTopics in Physical Chemistry9 more beyond
  - CHEM 114Physical Chemistry Laboratoryanother path to it
  - CHEM 114HPhysical Chemistry Laboratory (Honors)another path to it
- MAT SCI 131Diffusion and Diffusion-Controlled Reactions4 more beyond
  - MAT SCI 131LDiffusion and Diffusion-Controlled Reactions Laboratory
  - MAT SCI 132Structure and Properties of Metallic Alloys2 more beyond
- CHEM 114Physical Chemistry Laboratory
- CHEM 114HPhysical Chemistry Laboratory (Honors)
- PHYSICS 144Polymer Physics
- CHEM 118Colloidal Dynamics Laboratory
- CHEM C123AAdvanced Thermodynamics and Statistical Mechanics with Laboratory I
  - CHEM C123BAdvanced Thermodynamics and Statistical Mechanics with Laboratory II

6 courses list this as a requisite. Showing 60 courses over 3 levels; the branches marked with a count carry on past it. Every course here opens its own tree.

CHEM 20AHChemical Structure (Honors)

When it runs

Requisites

Report a problem

Requires

Unlocks

Report a problem

CHEM 20AHChemical Structure (Honors)

When it runs

Requisites

Report a problem

Requires

Unlocks