Things you Should Know from Chapters 1 and 2

Things you Should Know from Chapters 1 and 2 - 3 Know the...

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CHEM 102A-1 –Things should know from Chapters 1 & 2 LE – Fall 2008 Things to Know from Chapters 1 & 2 ( and that you should have seen in High School Chemistry ) CHAPTER 1 1. Define and distinguish between a hypothesis, theory and scientific law. 2. Understand Dalton’s atomic theory. 3. Classify matter according to the scheme (p.9). 4. Define and understand the difference between physical and chemical changes. 5. Determine and predict significant figures in calculations (Rules on p. 24). 6. Know the SI base units for length, mass, time, temperature, amount. 7. Know the prefixes that define powers of ten in scientific notation. 8. Know and calculate derived units of volume and density. CHAPTER 2 1. Structure of atom (nucleus, electron cloud, protons and neutrons). 2. Understand the role of chemical symbols and atomic numbers in a periodic chart.
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Unformatted text preview: 3. Know the families or groups – noble gases, alkali metals, alkali earth metals and halogens. 4. Calculate the mass number from the atomic number and the number of neutrons. 5. Define and understand isotopes, mass number, and natural abundance. 6. Calculate atomic mass from mass number and natural abundance. 7. Understand the relationship between mole and Avogadro’s number: (1 mol = 6.022 × 10 23 atoms) 8. Calculate and interconvert between number of moles and atoms. 9. Calculate and interconvert between number of moles and mass. Exam Tip: You may want to start to memorize Tables of common molecular ions: Tables 3.2 , 3.3 , 3.4 and 3.5 on p. 94-95. You will need to know these tables for the first exam....
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