electrons filled in three 2p orbitals 4.Thallium is a main-group element at Period 6 and Group IllA of the periodic table 5.(1)Cs, Ba, Sr;(2)Ca, Ga, Ge; (3)As, P,S Chapter 3 Molecular structure Exercises 1. Determine the hybridization state of the central atom in each of the following molecules:(a)HgCl2,(b) All3, and(c)PF3. Describe the hybridization process and determine the molecular geometry in each case 2. Use the VSEPR model to predict the geometry of the following molecules and ions (a)AsH3, (b)OF2, (c)AlCl4', (d)I3 3. The N2* ion can be prepared by bombarding the N2 molecule with fast-moving electrons. Predict the following properties of N2: (a)electron configuration,(b) bond order (c)magnetic character, and(d) bond length relative to the bond length of N2(is it longer or shorter?) 4. Which of the following can form hydrogen bonds with water? CH4, F, HCOOH, Answers (a)Hg is sp-hybridizedelectrons filled in three 2p orbitals. 4.Thallium is a main-group element at Period 6 and Group IIIA of the periodic table. 5.(1) Cs, Ba, Sr; (2) Ca, Ga, Ge; (3) As, P, S Chapter 3 Molecular Structure Exercises 1. Determine the hybridization state of the central atom in each of the following molecules: (a) HgCl2, (b) AlI3, and(c) PF3. Describe the hybridization process and determine the molecular geometry in each case. 2. Use the VSEPR model to predict the geometry of the following molecules and ions: (a) AsH3, (b) OF2, (c) AlCl4 ‐, (d) I3 ‐ 3. The N2 + ion can be prepared by bombarding the N2 molecule with fast-moving electrons. Predict the following properties of N2 + : (a) electron configuration, (b) bond order, (c) magnetic character, and (d) bond length relative to the bond length of N2 (is it longer or shorter?) 4. Which of the following can form hydrogen bonds with water? CH4, F ‐，HCOOH, Na+ Answers 1. (a) Hg is sp-hybridized