* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Chapter 1: Chemistry and You
Chemical element wikipedia , lookup
Nuclear chemistry wikipedia , lookup
Halogen bond wikipedia , lookup
Livermorium wikipedia , lookup
Stoichiometry wikipedia , lookup
Atomic orbital wikipedia , lookup
Isotopic labeling wikipedia , lookup
Size-exclusion chromatography wikipedia , lookup
Condensed matter physics wikipedia , lookup
Molecular orbital diagram wikipedia , lookup
Bent's rule wikipedia , lookup
Gas chromatography–mass spectrometry wikipedia , lookup
Metastable inner-shell molecular state wikipedia , lookup
Coordination complex wikipedia , lookup
Physical organic chemistry wikipedia , lookup
Bond valence method wikipedia , lookup
Chemistry: A Volatile History wikipedia , lookup
Organic chemistry wikipedia , lookup
Rutherford backscattering spectrometry wikipedia , lookup
Atomic nucleus wikipedia , lookup
Nanofluidic circuitry wikipedia , lookup
Drug discovery wikipedia , lookup
Organosulfur compounds wikipedia , lookup
Resonance (chemistry) wikipedia , lookup
Homoaromaticity wikipedia , lookup
Computational chemistry wikipedia , lookup
Metallic bonding wikipedia , lookup
Periodic table wikipedia , lookup
Electron configuration wikipedia , lookup
Molecular dynamics wikipedia , lookup
Inorganic chemistry wikipedia , lookup
History of chemistry wikipedia , lookup
Electronegativity wikipedia , lookup
IUPAC nomenclature of inorganic chemistry 2005 wikipedia , lookup
Hypervalent molecule wikipedia , lookup
History of molecular theory wikipedia , lookup
2015-2016 Chemistry Midterm Review This review sheet is a list of topics and sample practice problems only. The practice problems are good representation of what to expect on the midterm, but it is not enough to just study from the review. You need to look over your notes, old review sheets, tests and quizzes, homework, etc. Ask questions!!!! You may check your answers online and I am available Tuesday, Wednesday, and Thursdays for extra help. Chapter 1 & 2: Intro to Chemistry Key Topics: What is chemistry Uncertainty in Measurement –sig figs Physical and chemical properties Physical and chemical changes 1. Determine the number of significant figures in the following values: a. 6.70 _______ c. 15,300 _______ b. 0.03260 _______ d. 4.68 _______ 2. Perform the following calculations and express your answer with the correct number of significant figures: a. 34.0 x 45.62 = _______ b. 45 – 95.24 = _______ Chapter 3: Atomic Structure Key Topics: Models of the atom (modern atomic theory) Isotopic Notation, Subatomic particles Valence Electrons and Ions 3. Describe the basic structure of the atom in the modern atomic theory (be able to label protons, neutrons, electrons, and the nucleus) (Ch. 3): 4. 14 6 C protons = _______ neutrons = _______ 5. Distinguish between atoms, isotopes, and ions. electrons = _______ Chapter 4: The Periodic Table Key Topics: Organization of the Periodic Table (Periodic Law) Periodic Trends: Electronegativity Recognize properties of main groups 6. How are elements organized on the periodic table? Describe common trends across the periods and down the groups. (Ch 4): 7. Arrange the following elements in order of increasing electronegativity and decreasing ionization energy: Ca, Ge, As, K, Br, Ga 8. Recognize the following areas on your periodic table (some may overlap) and describe properties of the special families (Ch 4): o Metals o Nonmetals o Metalloids o Transition metals o Alkali family o Alkaline earth family o Halogen family o Noble gases 2 Chapter 5 & 6: Chemical Bonding Key Topics: Octet Rule Naming and writing formulas Properties of ionic versus covalent compounds Lewis Dot structures Polar vs. Non-polar VSEPR 9. Compare and contrast ionic and covalent bonds (Ch 5 and 6, essay): Ionic Both Covalent 10. Name the following ionic compounds or covalent molecules (Ch 5, 6): a. NH4Cl __________________ __________________ b. CO2 __________________ __________________ c. SiF4 __________________ __________________ d. CuO __________________ __________________ e. NaF __________________ __________________ f. CCl4 __________________ __________________ g. Mg(NO3)2 __________________ __________________ h. SnO4 __________________ __________________ 11. Write formulas for the following ionic compounds of covalent molecules (Ch 5, 6): a. magnesium hydroxide _____________ b. carbon monoxide _____________ c. copper(II) chloride _____________ d. selenium hexachloride _____________ e. calcium hydroxide _____________ f. sodium phosphate _____________ g. dinitrogen pentoxide _____________ h. phosphorus trichloride _____________ 3 11. Draw Lewis Structures (Ch 6): CH3Cl 12. OF2 SO3 Identify the shape and bond angle of molecular compounds (Ch 6): VSEPR Chart Reference Bonded Lone Atoms Pairs Linear 2 0 Bent 2 2 Tetrahedral 4 0 Trigonal Pyramidal 3 1 Shape Lewis Structure Shape Bond Angle 180 < 109.5 109.5 < 109.5 Bond angles NH3 SO2 CCl4 4 Chapter 8: The Mole Topics: Mole Avogadro’s number Percent composition Empirical formulas Molecular formulas Be able to… Calculate molar mass Convert between grams and moles Convert between number of particles and moles Perform multi-step conversions Calculate percent composition Determine empirical formula Determine molecular formula 13. Determine the molar mass of the following compounds (Ch 8): Al2(SO4)3 KBr Li2O 14. Find the percent composition of each element (Ch 8): %Mg in MgSO4? %H in C2H5O? 5 15. Mole conversions (Ch 8): # of moles in 2.5g of Aluminum Oxide? # of moles in 15g of Neon? # of atoms in 0.5mol of Gold? # of atoms in 1.5 grams of Zinc (II) Chloride? 6