CHAPTER 1- Practice Exercises (ORGANIC CHEM I )
________DR. PAHLAVAN
1. Given the ground-state electron configuration for the following atoms or ions.
C
N
K
Br 
Cl +
Si
Ni2 +
C2
Na +
2. How many valence electrons the following elements have in their valence shell?
C
Br
Si
Li
P
S
Mg
N
O
3. Write valence Lewis (electron dot) structures for each formula below. Show all bonding
electrons as dashes and all non-bonding electrons as dots.
a) CS2
b) HC2‾
c) CH3 +
d) CH3 ‾
e) CH2Cl2
g) CHClS
h) NH4+
i) H3O+
j) ONO+
k) CO(NH2)2 , Urea
l) C2Cl4, tetrachloroethylene
m) CH5N. methylamine
n) CH3OH2+
f) CH2N2
o) CH3N3
4. Loratadine - is a drug used to treat allergies, and marketed for its non-sedating properties.
d
c
b
e
a
I)
II)
f
Determine the hybridization for the indicated atoms
What is the electron domain geometry about the indicated atoms?
III) What is the molecular geometry (molecular shape) about the indicated atoms?
IV) What is the bond angle about the indicated atoms?
5. Draw the correct Lewis dot structures ( line bonds structures or Kekule structures) that
are consistent with valence electron rules for a compound with the molecular formulas .
a) C2H4O
b) CH4N2O
f) NCCH2COCH2CH2CHO
c) CO
d) N2H4
g) CH3CH 2CH(OH)CH2CO2H
1
e) CH3CH2CHCHOCH3
h) CH3NCO