A. What is the hybridization of the central atom in SeF6? Hybridization %3D What are the approximate bond angles in this substance ? Bond angles B. What is the hybridization of the central atom in PF5? Hybridization What are the approximate bond angles in this substance ? Bond angles =

11. What is the electron-domain geometry of water molecule (H2O)? a. bent b. tetrahedral c. trigonal planar d. linear 12. Write the correct Lewis dot structure for O2. Which statement correctly describes the structure of the whole molecule? a. There is a double bond and four lone pairs. b. There is a double bond and six lone pairs. c. There is a single bond and six lone pairs. d. There is a single bond, a double bond, and six lone pairs. 13. If there are four (4) electron pairs around the central atom of a molecule, these electron pairs are in a/n a. trigonal planar b. trigonal pyramidal arrangement. C. octahedral d. tetrahedral 14 The molecular geometry of the molecule NF3 is a. linear b. trigonal pyramidal c. tetrahedral d. trigonal planar 15 Which of the following species will exhibit tetrahedral molecular geometry? d. PCI5 a. CCI4 b. CO2 C. O3

Answer the following questions about graphene: a.Why do the bonded carbon atoms form a hexagonal pattern? b.Why is graphene conductive? Explain at an atom/molecular level. c.Ethylene (H2C=CH2) has the same carbon atom orbital hybridization as graphene, but ethylene is not conductive. Why is that?

16. For the molecule BrF5, what is its molecular geometry? Group of answer choices A. Square pyramid B. Octahedral C. trigonal pyramid D. tetrahedral

Which of the following molecules is polar? a. SiF4 b. SiO2 c. BF3 d. CH3Cl

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

This is not a real molecule, A is not an element, but if it was an molecule what would the molecular geometry of atom A be?    Linear Bent Trigonal pyramidal Trigonal planar Tetrahedral

5. Sulfur hexafluoride, SF, has an octahedral geometry with all the F-S-F bond angles being 90°. In BrF5, the F-Br-F bond angle is 81.9°, while in XeF4, the F-Xe-F angle is 90°. Explain why 90.0 90.0⁰ 90.0 90.0⁰ 90.0 90 84.8° 84.8 84.8 84.8 90.0⁰ *90.0* 90.0⁰ 90.0⁰