Question

1. Write the "best" Lewis structure (minimize formal charge, maximize number of resona structures) for the following species. Include formal charges on all atoms having any and give resonance structures. When appropriate, expand the octet to reduce formal charges and gain resonance structures. Give the electronic and molecular geometries for each and determine i they are polar or nonpolar. NO2 SO32- PO43- 2. Use formal charge to determine which Lewis structure is better: H-5--H H- -3-H

Answer 1

Ans: Lewis Structure- NOTA - Ñ =Ö Es Ö=ÑOLA FC = (Valence Shell electrons of Atom) - (Numbes on bonds Associated with the Atom) - Noot olacañshared electron by it) 0 = 0 - 1-6 = -1 Electronic geometry - Trigonal planay Molecular geome toy Bent polar Molecule ic=0: -> C =ó: FC ). 4-3-2-1 F.C(0) = 6-3-2 = +1 F0:42-2=0 F.C = 6-2-4 = 0 hox Carbon for Oxygen

Electronic geometry - linear :C=0: linear Molecular geometry - polar Molecule So - 10 :0:0 :00 F.C = (0,2 = 6-1-6=- 1 - (01) - 6-1-615-1__)- IS Electronic geometry - A Tetrahedral Molecular geometoy - Triganal pyramidal polar Molecule

Poyo to-=0 ( 20--0 <>03BÖ: 0 :00 FC = 6-1-6--1. (oxygen 2)) F. C = 6-1-6= -1 Coxygen 2 FC:6-1-6--1 (oxygen ) Electronic geome toy - Tetrahedralios Tetrahedra) Molecular geometry - - NomPolar Molecule!

g. Better Lewis Structure - 1 - Ć - S - H formal charge for better (Minimize the Lewis Structure)