Key to In-Class Group Activity 1
Chem 102, Fall 2005
(Not Graded)
1. What is the difference between an ionic bond and a covalent bond?
An ionic bond involves electron exchange between two atoms, they are held together by
attraction between the opposite charges. A covalent bond involves sharing of a pair of
electrons between two atoms.
2. Classify each of the following as an organic or an inorganic compound:
a) HCl
b) CHCl3
c) H3PO4
d) CH3OH
Inorganic
Organic
Inorganic
Organic
3. Write the structures for the following molecules:
a) CH2Cl2
b) C2H6
H
Cl
C
c) CH3OH
H
Cl
H
H
H
H
H
C
C
H
H
d) CH3NH2
H
C
H
H
OH
H
C
NH2
H
4. Classify each of the compounds in question 3 (above) as polar or nonpolar.
a) Polar
b) Nonpolar
c) Polar
d) Polar