Identify the type of bond formed from the orbitals shown in the picture below. A) sigma (o) bond B) sigma star (0*) antibond C) pi (π) bond D) pi star (TT*) antibond

What are the angles a and b in the actual molecule of which this is a Lewis structure? H H H C H a a = C b = ⁰ C H Note for advanced students: give the ideal angles, and don't worry about small differences from the ideal that might be caused by the fact that different electron groups may have slightly different sizes. H X

Consider the following ion: BrO3¯. a) Show the full electron configuration for Br. b) Draw the most correct Lewis structure for BrO3¯ and briefly explain why your Lewis structure is correct. c) If the structure is stabilised by resonance, draw at least one of the possible resonance forms. If it is not stabilised by resonance, briefly explain why. d) What is the electronic geometry of BrO3-? What is its molecular shape? e) Does BrO3 have a dipole moment? Briefly justify your answer. f) On average, would you expect IO3¯ to have longer or shorter bonds than BrO3¯? Briefly explain your answer. g) Which of the following molecules would you expect to have the lowest vapour pressure? Briefly explain your choice. Br HO HO. Br- Compound A Compound B Compound C h) What is the molecular formula for Compound C? What is the empirical formula for Compound C?

Answer the following questions about the Lewis structure for the organic molecule CH3CH2CH2CN (see examples in Chapter 10) There are valence electrons. The molecule has single bonds, double bonds, and triple bonds. The three central C atoms on the left have REDS and the shape at each of these is The central C on the right has REDS and the shape is The AENC-N = 0.49 which is only slightly polar and we will consider it to be nonpolar. %3D Since there is only slightly polar covalent bond, the molecule is mostly а. О b. 1 С. 2 d. 3 е. 4 f. 5 g. 8 h. 10 i. 12 j. 14 k. 16 I. 18 m. 20 n. 24 О. 28 р. 30 q. 32 r. 34 S. 36 t. diatomic u. pyramidal v. linear w. monoatomic ions x. tetrahedral y. trigonal planar z. bent aa. 120° bb. 180° dd. 109.5° cc. no bond angles, no central atom nonpolar ее. polar ff. gg. ionic hh. C and C

Draw a Lewis structure for the molecular formula: SnI3– This molecule only contains tin and iodine atoms.  Only one atom in this molecule should have a nonzero formal charge.  Has to show this nonzero formal charge in your Lewis structure. What is the geometry of the electron groups around iodine?

Choose the best Lewis structure for OCN. (It will help to work out the missing formal charges for the atoms in these different structures) [Image description: Lewis structure A has a C atom singly bound to a O atom and a N atom. There are three electron pairs on O and three electron pairs on N. Lewis structure B has a C atom singly bound to a O atom and triply bound to a N atom. There are three electron pairs on O and one electron pair on N. Lewis structure C has a C atom triply bound to a O atom and singly bound to a N atom. There is one electron pair on O and three electron pairs on N. Lewis structure D has a C atom doubly bound to a O atom and a N atom. There are two electron pairs on O and two electron pairs on N.] :0-c-N: :0-c=N: :0=C-N: o=c=N: A B Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b В C C d D

||| Predicting deviations from ideal bond angles Consider the perbromate (BrO4) : anion. What is the central atom? Enter its chemical symbol. How many lone pairs are around the central atom? What is the ideal angle between the bromine-oxygen bonds? Compared to the ideal angle, you would expect the actual angle between the bromine-oxygen bonds to be ... 0 口。 (choose one) (choose one) about the same bigger smaller

Identify the molecular shape of each of the molecules. Molecule SiHA SFA LL F F-C-F |||| Geometry Molecule BrF5 PCI, Geometry

Name Section Table 1: Complete this table with your partner. You may ask the instructor to check your work. Formula Lewis structure Molecular geometry and bond angle(s) around central atoms(s) Polar or nonpolar, draw dipole arrow Hybridization of each atom Orbitals involved in each bond CO2 2 x C=O: sp- sp o o=c=o° C: sp O: sp Linear, 180° Non-polar 2 x C=O: p-p TC COF2 CH2CH2 SCI2 SF4 atoms. atom