10
lesson pretestMultiple Choice

Pretest

Question 10 • Chemistry

Which is a property of covalent compounds?

Answer
A
They have a low boiling point.
B
They have a high melting point.
C
They ionize in solution.
D
They tend to be very hard.

Explanation

Covalent compounds consist of molecules held together by strong bonds within each molecule, but often weaker forces between molecules. It usually takes relatively little energy to separate the molecules, so many covalent compounds have low boiling points. They generally do not ionize in solution, and high hardness and high melting points are more typical of ionic or network covalent solids.

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