Name: Pd: Date 1: 2/2/15 Date 4: 2/5/15 1) How many val. e- does H2CO need? 1) How do you find the number of valence electrons available? 2) How many val. e- are available? 3) Draw the structure with the correct number of bonds. 2) How do you find the number of bonds? 3) All atoms need how many electrons (except H)? Date 2: 2/3/15 Date 5: 2/6/15 1) How many val e- does CH2Cl2 have available? 1) What is the lewis structure of CH4? 2) How many bonds does it need? 2) According to VSEPR, what shape is this? 3) Draw the Lewis Structure. 3) If one H is replaced with a lone pair, what shape does it become? Date 3: 2/4/15 Date 6: 2/9/15 1) Which periods can have more than an 1) What is the steric number of a octet? trigonal planar molecule? 2) For [ PO4 ] 3- , how many valence electrons are available? 2) What is the steric number of tetrahedral molecule? 3) Which group is usually the central atom? 3) What is the steric number of a trigonal pyramidal molecule? _ Name: Pd: Date 7: 2/10/15 Date 10: 2/19/15 1) Polar or nonpolar: HCF3? 1) How would you write Fe+4 using the stock system? 2) Does it have a dipole? 3) What type of intermolecular bond will it have? 2) A polyatomic ion with –ate at the end has (more / less) oxygens than an –ite. 3) Write sodium phosphate. Date 8: 2/11/15 Date 11: 2/20/15 1) Covalent bonds happen between what type of elements? 1) How do you find steric number? 2) What is the shape of H2O? 3) Is it polar or nonpolar? 2) What is the steric number of NH3? 3) What is the shape of NH3? Date 9: 2/18/15 Date 12: 2/23/15 1) In covalent bonds, electrons are… 1) What is the name of F-? 2) Draw the Lewis Structure of SeF4? 2) What is the name of Mn+3? 3) What is the VSEPR geometry of SeF4? 3) What is the name of Ca+2? _