Chapter 9 and Exam ReviewSupplemental InstructionIowa State UniversityLeader: KatieCourse: Chem 177Instructor: KingstonDate: November 14, 20101. Predict whether each of the following molecules is polar or nonpolar:a) IFb) CS2c) SO3d) PCl3e) SF6f) IF5g) GaH32. Dichloroethylene (C2H2Cl2) has three forms (isomers), each of which is a different substance. a) Draw Lewis structures of the three isomers, all of which have a carbon-carbon doublebond. b) Which of these isomers has a zero dipole moment?c) How many isomeric forms can chloroethylene, C2H3Cl, have? Would they be expected to have dipole moments?3. Label the periodic table with all of the following periodic trends: Atomic radii, ionic radii, effective nuclear charge, ionization energy, electron affinity, and electronegativity.Supplemental Instruction1060 Hixson-Lied Student Success Center v 294-6624 v www.si.iastate.edu4. An electron cannot have the quantum numbers n = ______, l = ______, ml = ______. a) 2, 0, 0b) 2, 1, -1c) 3, 1, -1d) 1, 1, 1e) 3, 2, 15. In general, as you go across a period in the periodic table from left to right1) the atomic radius ________;2) the electron affinity becomes________ negative; and3) the first ionization energy________;a) decreases, decreasingly, increasesb) increases, increasingly, decreasesc) increases, increasingly, increasesd) decreases, increasingly, increasese) decreases, increasingly, decreases6. Which of the following is an isoelectronic series?a) B5- , Sr4-, As3-, Te2-b) F-, Cl- , Br-, I-c) S, Cl, Ar, Kd) Si2-, P2-, S2-, Cl2-e) O2-, F-, Ne , Na+7. In the molecule CFClIBr, which atom has the largest partial negative charge?a) Clb) Fc) Brd) Ie) C8. Of the following elements, ___________ has the most negative electron affinity.a) Nab) Lic) Bed) Ne) F9. Of the following species, ____________ has the largest radius.a) Rb+b) Sr2+c) Br -d) Kre) Ar10. In the Lewis symbol for a fluorine atom, there are __ paired and __ unpaired electrons.a) 4,2b) 4,1c) 2,5d) 6,1e) 0,511. Given the electronegativities below, which covalent single bond is most polar?Element: H C N OElectronegativity: 2.1 2.5 3.0 3.5a) C-Hb) N-Hc) O-Hd) O-Ce) O-N12. The bond length in an HI molecule is 1.61 A and the measured dipole moment is 0.44 D. What is the magnitude (in units of e) of the negative charge on I in HI?13. Draw the Lewis structure for CH2O.14. Write the balanced chemical equation for the reaction.a) Potassium metal burns in an atmosphere of chlorine gas.b) Strontium oxide is added to