CHM 111 Lewis Structures and Valence Electrons Discussion

The whole lab document is also attached.

• Draw Lewis structures for the following:
• There are some rare cases where the octet rule is not obeyed.Groups 2 and 3 can have incomplete octets and periods, while groups 3, 4, and 5 can expand their octet.With this in mind draw the Lewis Structures for:
• Classify the following bonds as pure covalent, polar covalent, or ionic.

undefined
undefined

• NH₃valence e- = (D)HOCl (O is central)valence e- =
• HCPvalence e- =(E)CF₄valence e- =
• NO₃–valence e- =(F)SOF₂valence e- =

undefined

• SO₄^2–valence e- =(H)NH₄⁺valence e- =

undefined

(J) SiO₂valence e- =(K) O₃valence e- =

undefined

• CH₃CH₂OHvalence e- =(M)CH₃NH₂valence e- =

undefined
undefined

• BeH₂(C)I₃^–
• SF₆(D) ClF₃

undefined

If polar covalent, indicate the polarity of the bond with ?- and ?+.The element with the lower electronegativity is labeled with a ?+.

undefined

• H – Cl(E)C – C

undefined

undefined

(B)N – Br(F)S – O

undefined

undefined

(C)H – C(G)I – Br

undefined

undefined

(D)K – Cl(H)S – B

undefined

4.

undefined

Molecular Formula	Lewis Structure	Number of electron groups on central atom	Number of lone pairs on central atom	Molecular Geometry	Bond angle(s)	Polar? Yes or No	Hybrid-ization
NOBr
SiF4
XeF4
PCl5
CO2

undefined

5.Calculate formal charge for each atom.Circle the most favorable structure, if any.

undefined

6. Draw resonance structures for the following molecules.Calculate formal charge for each atom.Circle the most favorable structure, if any.

undefined

• COBr₂
• CH₃CONH₂ (connectivity as shown below)

undefined

7. For each of the following, draw all bond dipoles on the first structure, then draw the net dipole on the second structure.If non-polar, write “no net”.

undefined

Bond dipoles	ex:
Net dipole	ex:

undefined

8. The following are the two possible Lewis structures for C₂H₂F₂. Will both of them have the same dipole moment? Draw bond dipoles, net dipole direction, and explain your answer.