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CHEM 219 ORGANIC CHEMISTRY MODULE 1 EXAM –
PORTAGE LEARNING
Question 1 On a piece of scratch paper, write out the Lewis Dot Diagram for each of the indicated elements
and determine the following for each:
a) The number of Lone Pairs the atom possesses in its valence shell.
b) The number of Unpaired Electrons the atom possesses in its valence shell.
c) The number of bonds the atom will form.
- Oxygen
- Carbon
- Hydrogen
- Nitrogen
- 2 lone pairs
- 2 unpaired electrons
- 2 bonds
- 0 lone pairs
- 4 unpaired electrons
- 4 bonds
- 0 lone pairs
- 1 unpaired electron
- 1 bond
- 1 lone pair
- 3 unpaired electrons
- 3 bonds
QUESTION 2
Classify the bonding between the given pairs of atoms as ionic, covalent, or polar covalent. Use the table of electronegativities shown below to help with the classification.
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- Br and Br
- K and Cl
- P and Cl
- C and O
- Na and Br
Your Answer:
- Covalent (purely)
- Ionic
- Polar covalent
- Polar covalent
- Polar covalent
QUESTION 3
Define the term constitutional isomer.
Your Answer:
Constitutional isomer - when an atom within a compound has a different connection point in their structural formula, but the same molecular formula
Question 4 Explain (using specific evidence) what makes the following two compounds constitutional
isomers of one another:
Your Answer:
Compound A and Compound B are constitutional isomers of each other because they each have 3 carbons that have 4 bonds, they each have 6 hydrogens forming 1 bond with a carbon, and they
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