Consider the structure below. What is the electron geometry for the circled central atom? H H HH H. -CEC-H H

Fill in the lone pairs on each atom to give every main group element except hydrogen an octet.

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance A B C D H chemical symbol, chemical formula or Lewis structure H | HC H | N H- HIC - C C - H Η H HIC C I | H H — — - H Cr O-H Ar :O: O HIC - H C H - H - X boiling point (Choose one) ◊ (Choose one) (Choose one) (Choose one) ✪ S

D. The Structure of Benzene Bond Angles Lewis Structure of Benzene Spatial Formula of Benzene all AC-C=C = all AH-C=C = all AH-C-C =

Choose the least polar bond using electronegativities. F - 4.0 O - 3.5 N - 3.0 Cl - 3.0 S - 2.5 I - 2.5 P - 2.1 Li - 1.0 Na - 0.9

Rank the elements or compounds in the table below in decreasing order of their boiling points. That is, choose 1 next to the substance with the highest boiling point, choose 2 next to the substance with the next highest boiling point, and so on. substance A B U e chemical symbol, chemical formula or Lewis structure Ar Ag H :0: H 1 HIC C-C-H 1 H H H H H HIC CICI H H H - H boiling point (Choose one) (Choose one) (Choose one) (Choose one) X

What's the answer?

Use the molecular model kit to construct the following models, and then fill in the boxes for each molecule. When possible. show a resonance Lewis structure. Use formal charge, when possible to select the best structure. Follow example for CH4 below. Formula #VES Lewis Structure H CH4 8 H C H -I H Resonance? (Y/N) Show N Electron Group & Bond Angle Tetrahedral 109° Molecular Geometry Polar? (Y/N) tetrahedral N VSPER Sketch H 1 H 109.5° H H Hybridization sp³

Consider the compound with the folloring lewis structure: Draw the molecule to show its correct 3 dimensional shape, then label the shape around each central atom. What are the bond angles here?

Counting available electrons and drawing a Lewis structures