Portage Learning Chem 219 Principles of Organic Chemistry Module 1 Exam

Portage Learning Principles of Organic Chemistry Module
1 Exam.

Question 1

On a piece of scratch paper, write out the Lewis Dot Diagram for each of the indicated elements
and then complete the following table for each:



1. Bromine
2. Silicon
3. Carbon
4. Sodium
5. Selenium



*Write number using number (1, 2, 3 etc.) rather than typing out the number (one, two, three).

Answer

Element Total Number of The number of The number of The number of
Valence lone pairs of Unpaired bonds the atom
Electrons electrons Electrons will form


Br 7 3 1 1
Si 4 0 4 4
C 4 0 4 4
Na 1 0 1 1
Se 6 2 2 2




Question 2

Classify the bonding between the given pairs of atoms as ionic, covalent, polar covalent, or
purely covalent. Use the table of electronegativities shown below to help with the classification.

, Answer

Bond X Classification
O-H 1.4 Polar Covalent
Cl-Br 0.2 Covalent
N-P 0.9 Polar Covalent
N-N 0 Purely Covalent
K-S 1.7 Polar Covalent




Question 3

What is the relationship between the compounds shown? Are they the same compound,
constitutional isomers, or two different compounds that are not related to one another?
Explain.




Answer:

Two different compounds. They have different molecular formulae.



Question 4

What is the molecular formula for the indicated structural formula?