Chemistry 1st Semester Exam – Review Topics
A document containing practice problems and questions is posted on the Welcome page of my web site. (Go to Strongsville.org, Strongsville High School, Teachers)
Chapter 2:
1. Scientific Notation - Convert numbers between scientific notation and decimal forms.
2. Know all metric conversions and metric prefixes.
3. Significant Figures – Know what is meant by the significant figures in a measurement. Know rules for counting significant figures in measurements (page 24)
4. Know rules for rounding off numbers.
5. Know rules for using significant figures in calculations (multiplying and dividing, adding and subtracting).
6. Problem Solving and Dimensional Analysis – be able to do all types of conversion problems.
7. Convert from Kelvins to degrees centigrade, and degrees centigrade to Kelvins
8. Density = Mass/Volume. Use formula to solve for density, volume, or mass.
Chapter 3 (3.1 to 3.5 only ):
9. Why do the densities of most substances decrease with an increase in temperature?
10. Discuss the differences between physical changes and chemical changes, and physical and chemical properties.
11. Matter: differentiate between elements, compounds, mixtures, and pure substances.
12. Discuss techniques for separating mixtures
Chapter 4 (all, except 4.3, 4.5);
13. Atomic structure – parts, location, charges, and masses. Identify atomic number and mass number. How do they differ between isotopes of an element? Identify numbers of protons, neutrons and electrons in atoms and ions.
14. What are isotopes? Calculate the average mass number of an element.
15. Periodic Table – know the info it contains: atomic number, mass number, types of elements.
16. Ions – how are they formed, know how to determine charges on an ion using the periodic table; know how to name
positive ions (cations) and negative ions (anions)
17. What are the natural states of the elements in the periodic table (solid, liquid, noble gas, diatomic gas, etc.)
18. Discuss how neutral compounds are formed from ions.
Chapter 5:
19. Write the name of a compound given its formula; write the formula given its name.
20. Write formulas for polyatomic ions.
21. Distinguish between types of chemical compounds: ionic (metal plus nonmetal, metal plus PA ion) and nonionic (two nonmetals).
Chapter 6:
22. What is the evidence for a chemical reaction?
23. Balance chemical equations.
Chapter 7:
24. Write a chemical equation from the name of each reactant and product and balance the equation.
25. Predict products when given the names of the reactants
26. Identify the types of chemical reactions and give examples: precipitation (double displacement), acid-base, and
oxidation-reduction (includes single displacement, combustion, synthesis, decomposition).
27. Assign oxidation numbers and identify oxidized and reduced atoms in a redox reaction.
28. Label chemical reactions with their physical states (g, aq, s, l). What does “aq” mean?
29. Solubility rules – be able to use them to determine if a solid is formed from ions in solution.
Chapter 8:
30. Define “mole”.
31. Convert between grams, moles, and number of atoms or molecules.
32. Determine the molar mass of elements and compounds. Work problems involving molar mass.