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AP chemistry Test Review Short Answer: 1. Report the number of significant figures in each of the following values: 2. 0.00237g ______________ 3. 0.002037g _______________ 4. 350. _______________ 5. 64Ml_________________ Question 1-4 Refer to the following elements: a) b) c) d) e) Fluorine Chlorine Bromine Iodine Astatine 1. The element that is most active chemically 2. The element with the smallest ionic radius 3. The element with the lowest ionization energy 4. The element that first shows some visible metallic properties at room temperature. Question 5-7 a) b) c) d) e) 1s 2s 3s 3p 3d 5. Contains up to 10 electrons 6. Contains one pair of electrons in the ground state electron configuration of the lithium atom 7. Is exactly one half filled in the ground state electron configuration of the phosphorus atom 8. The most active metallic elements are found in : a) The upper right corner of the periodic table b) The lower right corner of the periodic table c) The upper left corner of the periodic table d) The lower left corner of the periodic chart e) The middle of the periodic chart, just beyond the transition elements 9-11 Select the scientist primarily responsible for the findings in each question a) Dalton b) Einstein c) Heisenberg d) Thomas e) Rutherford 9. Made important discoveries about the properties of cathode rays 10. Proposed the existence of a nucleus 11. Determined that it was impossible to know simultaneously information about the location and movement of electrons 12. Which set of quantum numbers (n,l,ml, ms) is not possible? a) 1,0,0,1/2 b) 1,1,0,1/2 c) 1,0,0,-1/2 d) 2,1,-1,1/2 e) 3,2,1,1/2 13. Free Response: Cholorophyl a, a photosynthetic pigment found in plants, absorbs light with a wavelength of 660 nanometers. a) Determine the frequency in S of chlorophyll a b) Calculate the energy of a photon of light with a wavelength of 660nm 14. The energy required to remove an electron from a gaseous atom is known as: a) Activation energy b) Ionization energy c) Kinetic energy 15. Which of the following has the most polar bond? a) N2 b) F2 c) HF d) HCL e) PCL3 16. Which molecule has a Lewis structure that does NOT obey the octet rule? a) b) c) d) e) NO CS2 PF3 HCN CCL4 17. Determine the molecular geometries of the following molecules: a) H2Se b) BrF3 c) SCl4 18. The electron dot structure for which of the following molecules would have one unshared pairs of electrons on the central atom? a) b) c) d) e) H2O NH3 CH4 C2H2 CO2 19. Which of the following molecules has a trigonal pyramidal shape a) b) c) d) e) PCL5 N2O NH3 CCL4 H2O2 20. Which of the following regarding the Rutherford experiment is not correct: a) Most alpha particles passed through the gold foil without being deflected since the nuclei of the gold atoms represent such a small portion of the total atomic volume. b) Coulombs law which states that like charges repel each other, accounts for the deflection of alpha particles passing close to gold atom nuclei. c) Most alpha particles passed through the gold foil without being deflected since the nuclei of the gold atoms represent such a small portion of the atomic mass. d) Because of the electrons small masses they did not deflect the alpha particles. e) The high charge of the gold nuclei helps to account for their ability to deflect smaller helium nuclei passing close by. 21. With respect to electronic configuration which of the following is not correct. a) Se and O have an identical number of valence electrons. b) B and Cl both have the same number of unpaired electrons in their ground state electron configuration. c) O and F have an identical electron configuration. d) Ne and Ar both have a filled p-orbital in the valence shell. e) Se and Br are expected to have similar chemical properties since they are in the same row of the periodic table.