Bonding Practice Extra Questions

            This unit will cover the other way that elements combine to form ionic, metallic and molecular compounds: covalent bonds.  Writing formulas, naming molecular compounds and showing written representations of covalent bonds will be stressed.  In addition, you will need to remember and use the basic arrangement of the periodic table to uncover bonding patterns.

2) The atoms of materials that conduct electricity best tend to be held together by
A) covalent bonds.
B) metallic bonds.
C) ionic bonds.
D) polar covalent bonds.

3) The individual particles in a covalent crystal are
A) electrons.
B) molecules.
C) ions.
D) atoms.

4) Which of these covalent bonds is most polar?
A) F-As
B) F-F
C) F-S
D) F-0

5) An individual carbon-oxygen bond is polar. Yet carbon dioxide, CO₂, which has two carbon- oxygen bonds in opposite directions, is nonpolar because
A) at low temperatures carbon dioxide solidifies into dry ice.
B) the two vectors of the carbon-oxygen bonds in CO₂ cancel each other out
C) any molecule containing two polar bonds is always nonpolar.
D) none of the above.
 

1) D
2) B
3) B
4) A
5) B