CHE 100 Exam 1 Study Guide Overview and Key Topics

CHE 100 Exam 1 Study Guide: Key Topics and Preparation Tips

Background

This page outlines the structure and content areas for the CHE 100 (General, Organic, and Biological Chemistry) Exam 1. It provides guidance on what students should focus on while preparing, including allowed materials, exam format, and a comprehensive list of topics.

Key Terms and Concepts:

• Significant Figures: Understanding how to determine and use significant digits in calculations.

• SI Units: Standard units for volume, length, mass, temperature, and time.

• Unit Conversions: Using prefix multipliers (milli, micro, centi, kilo) and conversion factors.

• Temperature Calculations: Converting between Celsius, Fahrenheit, and Kelvin.

• Density: Using density as a conversion factor and understanding its definition.

• Isotopes: Identifying isotope symbols, subatomic particles, mass number, and atomic number.

• Chemical Symbols & Names: Recognizing elements (atomic numbers 1–36 & 53).

• Valence Electrons: Determining and defining valence electrons.

• Lewis Dot Symbols & Structures: Drawing and interpreting Lewis structures.

• Pures Substances vs. Compounds: Differentiating between these types of matter.

• Mixtures: Distinguishing between homogeneous and heterogeneous mixtures.

• Ionic vs. Molecular Compounds: Definitions, naming rules, and formula rules.

• Polyatomic Ions: Names, symbols, and charges for phosphate, sulfate, nitrate, and hydroxide.

• Chemical Reactions: Types (combination, decomposition, single/double displacement, combustion).

• Balancing Chemical Reactions: Applying the law of conservation of mass.

• Stoichiometry: Using Avogadro’s number, molar mass, and mole ratios.

• Determining Molar Mass: Calculating from atomic masses.

Step-by-Step Guidance for Preparation

1. Review your lecture notes and problem sets for each topic listed above. Focus on understanding the concepts, not just memorizing facts.

2. Practice calculations involving significant figures, unit conversions, and temperature changes. Make sure you can use the correct formulas and conversion factors.

3. Work through problems involving isotopes, Lewis structures, and chemical nomenclature. Practice drawing and interpreting Lewis dot symbols.

4. Study the differences between pure substances, compounds, and mixtures. Be able to classify examples and explain your reasoning.

5. Practice balancing chemical equations and solving stoichiometry problems using molar mass and Avogadro’s number.

Try creating your own practice questions or flashcards for each topic before moving on to the next section!