1. Molecular Geometry bond length,angledetermined experimentally Lewis structures bonding geometry VSEPR Valence ShellElectronPairRepulsion octahedron 90 o bond angles trigonal bipyramid equatorial120 o axial 180 o big groups small groups

2. tetrahedron 109.5 o trigonal planar 120 o linear180 o geometry apply to Chemistry

3. linear180 o BeCl 2 valence e - = 2 +(2 x 7)= 16e - Cl.. Be Cl.. fewer than 8e - valence pairs on Bebonding e - linear molecule two

4. linear180 o CO 2 valence e - = 4 +(2 x 6)= 16e - C O.. O C O O valence pairs on C ignore double bondstwo single and double bonds same linearmolecular shape molecular geometry linear

5. trigonal planar120 o SO 2 valence e - = 6+(2 x 6)= 18e - valence pairs on Sthree one lone pair molecular geometry molecular shape bent trigonal S O.. O : S O O : S O O : two bonding pairs < 120 o

6. tetrahedral109.5 o CH 4 valence e - = 4+(4 x 1)= 8e - valence pairs on Cfour C HH H H 109.5 o molecular geometry molecular shape tetrahedral

7. 109.5 o NH 3 valence e - = 5+(3 x 1)= 8e - valence pairs on Nfour N HH H : < 109.5 o molecular geometry molecular shape trigonal pyramid tetrahedral one lone pair three bonding pairs

8. tetrahedral109.5 o H2OH2O valence e - = 6+(2 x 1)= 8e - valence pairs on Ofour O HH : : < 109.5 o molecular geometry molecular shape bent tetrahedral two lone pair two bonding pairs

9. bipyramidal120 o and 180 0 PCl 5 valence e - = 5+(5 x 7)= 40e - valence pairs on Pfive molecular geometry molecular shape bipyramidal P Cl.. Cl.. Cl.. Cl.. Cl.. 90 o 120 o 180 o

10. bipyramidal120 o and 180 0 SF 4 valence e - = 6+(4 x 7)= 34e - valence pairs on Sfive molecular geometry molecular shape seesaw bipyramidal one lone pair four bonding pairs S.. F F F F : < 180 o

11. bipyramidal120 o and 180 0 ClF 3 valence e - = 7+(3 x 7)= 28e - valence pairs on Clfive molecular geometry molecular shape T bipyramidal two lone pair three bonding pairs Cl.. F F F : : 180 o 90 o

12. bipyramidal120 o and 180 0 ICl 2 - valence e - = 7+(2 x 7)+ e - valence pairs on Ifive molecular geometry molecular shape linear bipyramidal three lone pair on I two bonding pairs = 22e - I.. Cl.. : : Cl.. :

13. octahedral90 o BrF 5 valence e - = 7+(5 x 7) valence pairs on Brsix molecular geometry molecular shape square pyramidal octahedral = 42e - one lone pair five bonding pairs Br F.. F F F F :

14. octahedral90 o XeF 4 valence e - = 8+(4 x 7) valence pairs on Xesix molecular geometry molecular shape square planar octahedral = 36e - two lone pair four bonding pairs Xe F.. F F F : :

16. Cl.. Be Cl.. S O O S O O S O O S OO : C O O C O O B : : F :: : F :: : F : : : C HH H H N HH H :

17. O HH : : P Cl.. Cl.. Cl.. Cl.. Cl.. S F F F F : Cl.. F F F : : I Cl.. : : Cl.. : F S F F F F F

18. Br F.. F F F F : Xe F.. F F F : :