Download Worksheet 3 - Oregon State chemistry

Chemistry 121
Worksheet 3
Oregon State University
Dr. Richard L Nafshun
1.
Which of the following sets of elements will form a molecular compound? Explain.
(a)
Ni and Cu.
(b)
Li and F.
(c)
Li and Mg.
(d)
C and Cl.
(e)
He and Mg.
2.
List a pair of elements that will form a molecular compound.
3.
Which of the following substances is an ionic compound? Explain.
(a)
Octane.
(b)
Carbon dioxide.
(c)
Sodium fluoride.
(d)
Dinitrogen pentoxide.
(e)
Acetic acid.
4.
List a pair of elements that will form an ionic compound.
5.
How many bonds does carbon form? How many bonds does nitrogen form? How many
bonds does oxygen form? How many bonds does fluorine form? How many bonds does
argon form?
6.
Sketch a molecule that contains two carbon atoms and six hydrogen atoms. Name this
molecule. What is the chemical formula of this molecule?
7.
Sketch a molecule that contains two nitrogen atoms and four hydrogen atoms. What is
the chemical formula of this molecule? Hydrazine is a colorless oily liquid that fumes in
air.
8.
Sketch a molecule that contains a carbon atom, three chlorine atoms, and a fluorine atom.
9.
Sketch a molecule that contains two nitrogen atoms. Sketch a molecule that contains two
oxygen atoms. Sketch a molecule that contains two chlorine atoms.
10.
Sketch pentane. What is the chemical formula of pentane?
11.
Sketch octane. What is the chemical formula of octane?
12.
The chemical formula of magnesium phosphate is ___________________________ .
Is this an ionic or molecular compound? Explain.
13.
The chemical formula of phosphorous pentachloride is ________________________.
Is this an ionic or molecular compound? Explain.