Atomic Radius

Question 1

 As the difference in electronegativity between two atoms increases, the polarity of a bond               between those two atoms

      A.  increases.

      B.  decreases.

      C.  remains the same.

Question 2

The following table lists normal boiling points for different substances:

Substance Boiling Point (°C)
propionic acid 140.8
acetic acid 117.9
acetone 56.24
2-methylbutane 27.9

Which of the following alternatives is true?

      A.  The intermolecular forces of propionic acid is the highest of all the substances listed under these             conditions.

      B.  The molecules of acetone experience the weakest interactions compared to any other substance listed.

      C.  The molecules of propionic acid experience the weakest interactions compared to any       other substance listed.

      D.  Alternatives A and C are correct.

Question 3

Hydrogen bonding will not occur in molecules that contain bonds between hydrogen and

      A.  fluorine.

      B.  oxygen.

      C.  bromine.

      D.  nitrogen.

Question 4

Hydrogen bonds will form between molecules of compounds in which hydrogen is bonded to         atoms of elements with

      A.  high electronegativity and large atomic radius.

      B.  high electronegativity and small atomic radius.

      C.  low electronegativity and large atomic radius.

      D.  low electronegativity and small atomic radius.

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