CHEM120 EXAM 3
Enhanced Exam-Oriented Study Guide
Introduction to General, Organic & Biological Chemistry
2025–2026-aligned topic focus
Original study material inspired by the publicly visible preview of the referenced Stuvia
document. This guide expands the concepts into explanations, worked examples,
memory aids, practice questions, and exam traps.
Core areas: radiation & half-life • electronegativity & bonding • molecular geometry •
polarity • nomenclature • hydrocarbons & functional groups • biomolecules • biochemical
energy concepts • mixed exam practice
Important: This is an original study aid, not an official Chamberlain University exam, answer key, or reproduction of the
paid source.
CHEM120 Exam 3 — Enhanced Study Guide Page 1
, TABLE OF CONTENTS
• 1. How to Use This Guide
• 2. Radiation, Radioactivity & Half-Life
• 3. Electronegativity, Bonding & Polarity
• 4. Molecular Geometry & VSEPR
• 5. Lewis Structures & Formal Charge
• 6. Organic Chemistry Foundations
• 7. Naming Alkanes, Alkenes & Alkynes
• 8. Functional Groups & Isomerism
• 9. Biomolecules: Carbohydrates
• 10. Biomolecules: Lipids
• 11. Biomolecules: Proteins
• 12. Nucleic Acids & ATP
• 13. Metabolism & Biochemical Energy
• 14. High-Yield Comparison Tables
• 15. Original Q&A; Review
• 16. Mixed Practice Exam — 50 Questions
• 17. Answer Key & Rationales
• 18. Exam Traps, Mnemonics & Last-Minute Checklist
Study strategy: Read the concept summary, cover the answers, solve the Q&A; without looking, then use the rationales
to identify the exact rule you missed. Repeat missed questions later rather than simply rereading them.
CHEM120 Exam 3 — Enhanced Study Guide Page 2
, 1. HOW TO USE THIS GUIDE
The referenced Stuvia page is a 20-page Q&A-style; document and its public preview includes topics such as radiation
protection, H■O molecular geometry, electronegativity trends, polar versus nonpolar bonds/molecules, and chemical
naming. The goal here is to build an original, broader review around those visible concepts rather than reproduce the
paid document.
Three-pass method
• Pass 1 — Understand: Learn the rule and one worked example.
• Pass 2 — Retrieve: Answer questions from memory without notes.
• Pass 3 — Discriminate: Compare similar concepts that are easy to confuse, such as bond polarity versus molecular
polarity or alkene versus alkyne.
Exam language to watch
• “Increasing” means smallest → largest.
• “Decreasing” means largest → smallest.
• “Polar bond” refers to unequal electron sharing between two bonded atoms.
• “Polar molecule” requires a net molecular dipole after considering the entire shape.
• “Geometry” depends on electron-group arrangement, not merely the chemical formula.
• “Half-life” is the time required for half of the radioactive sample to decay.
CHEM120 Exam 3 — Enhanced Study Guide Page 3
Enhanced Exam-Oriented Study Guide
Introduction to General, Organic & Biological Chemistry
2025–2026-aligned topic focus
Original study material inspired by the publicly visible preview of the referenced Stuvia
document. This guide expands the concepts into explanations, worked examples,
memory aids, practice questions, and exam traps.
Core areas: radiation & half-life • electronegativity & bonding • molecular geometry •
polarity • nomenclature • hydrocarbons & functional groups • biomolecules • biochemical
energy concepts • mixed exam practice
Important: This is an original study aid, not an official Chamberlain University exam, answer key, or reproduction of the
paid source.
CHEM120 Exam 3 — Enhanced Study Guide Page 1
, TABLE OF CONTENTS
• 1. How to Use This Guide
• 2. Radiation, Radioactivity & Half-Life
• 3. Electronegativity, Bonding & Polarity
• 4. Molecular Geometry & VSEPR
• 5. Lewis Structures & Formal Charge
• 6. Organic Chemistry Foundations
• 7. Naming Alkanes, Alkenes & Alkynes
• 8. Functional Groups & Isomerism
• 9. Biomolecules: Carbohydrates
• 10. Biomolecules: Lipids
• 11. Biomolecules: Proteins
• 12. Nucleic Acids & ATP
• 13. Metabolism & Biochemical Energy
• 14. High-Yield Comparison Tables
• 15. Original Q&A; Review
• 16. Mixed Practice Exam — 50 Questions
• 17. Answer Key & Rationales
• 18. Exam Traps, Mnemonics & Last-Minute Checklist
Study strategy: Read the concept summary, cover the answers, solve the Q&A; without looking, then use the rationales
to identify the exact rule you missed. Repeat missed questions later rather than simply rereading them.
CHEM120 Exam 3 — Enhanced Study Guide Page 2
, 1. HOW TO USE THIS GUIDE
The referenced Stuvia page is a 20-page Q&A-style; document and its public preview includes topics such as radiation
protection, H■O molecular geometry, electronegativity trends, polar versus nonpolar bonds/molecules, and chemical
naming. The goal here is to build an original, broader review around those visible concepts rather than reproduce the
paid document.
Three-pass method
• Pass 1 — Understand: Learn the rule and one worked example.
• Pass 2 — Retrieve: Answer questions from memory without notes.
• Pass 3 — Discriminate: Compare similar concepts that are easy to confuse, such as bond polarity versus molecular
polarity or alkene versus alkyne.
Exam language to watch
• “Increasing” means smallest → largest.
• “Decreasing” means largest → smallest.
• “Polar bond” refers to unequal electron sharing between two bonded atoms.
• “Polar molecule” requires a net molecular dipole after considering the entire shape.
• “Geometry” depends on electron-group arrangement, not merely the chemical formula.
• “Half-life” is the time required for half of the radioactive sample to decay.
CHEM120 Exam 3 — Enhanced Study Guide Page 3
