CHE 110 Lecture Notes - Lecture 9: Ionic Compound, Fluorine, Ionic Bonding

7. Which of the following atoms has three unpaired electrons? A) Al B) o C) N D) S E) C S. Consider the following electron arrangements. Which represents for N? b) c) d) e) A) option a B) option b C) option c D) option d E) optione 9. Specify the group of the periodic table in which each of the following elements is found (a) [Ne]3s', (b) [Ne]3s 3p. (c) [Ne]3s 3ps, A) Group 1A, 5A, 8A B) Group 2A, 3A, 8A C) Group 2A, 4A, 8A D) Group 2A, 5A, 8A E) Group 1A, 3A, 6A 10. Which of the following atoms has the electron configuration as [Ar] 4ddn A) Sc B) V C) Fe D) Co E) Zn

Draw the lewis Dot Structure for the following molecules- You can use S=N-A or not. Remember a) get the best structure using the octet rule (assume all atoms have to obey the octet rule) b) determine the formal charge on each atom c) identify the elements which can have an expanded octet (row 3 and below) d) Try to reduce formal charges by redistributing electrons from elements on the periphery (usually these do not have more than 8 electrons) to the inner atoms which can accommodate expanded octets. e) make sure only atoms which can accommodate expanded octets actually have expanded octets. f) Make sure only atoms which are m groups 2, 3 have less than 8 electrons in their valence shell. O_3 PF_5 N_2O_4 5F_4 H_2CO_3 H_2CO H_2SO_3 SO_4^-2 BF_3 AlH_4^-1 CH_3CH_2NH_2 H_2O HF 2. Determine the electron domain geometry for each of the above compounds. Determine the molecular geometry for each of the compounds in question 1 Determine the hybridization for each of the atoms in question 1 Which of the compounds in question 1 will have a dipole? (first determine if polar covalent bonds exist, then see if they reinforce or cancel each other out) Which of the compounds in question 1 exhibit hydrogen bonding? Which of the compounds in question 1 exhibit resonance. Which of the compounds in question 1 exhibit dispersion forces? For the following organic molecules, determine the number of pi bonds, number of n bonds, number of sp^3, sp^2, sp hybridzed atoms, number of lone pairs, electronic domain geometries and molecular geometries.

3A 4A 5A 6A 7A He 1314 15 16 17| 5 6 7 8 9 10 ls' 2A Core Li Be Hel 2 11 12 Na Mg3B 4B 5B 6B 7B 8 9 B 2B 13 14 15 16 17 18 Nel 13/13/13 4 5 6 7 、11 12 19 20 2 22 23 2425 26 27 2829 30 332 33 34 3536 K Ca Sc T VCr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 37 38 39 40 4 443 44 4546 47 48 49 50 5152 53 54 Rb Sr Y Zr Nb Mo TRu Rh Pd Ag Cd In Sn Sb Te I Xe 55 56 772 73 7475 76 77 78 79 80 81 82 83 8485 86 57 5859 60 6 6 63 64 65 66 67 68 69 70 La CePrNd Pm Sm Eu GdTb Dy Ho Er Tm Yb Lanthanide series Xel 89 90 91 92 93 94 95 96 97 9899 100 101 102 Actinide sris AcTh Pa UNp Am Cm Bk CEFm Md No Metals Metalloids Nonmetals 6180 33-21 Sc /4-39 Y