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March 28, 2015

Homework Help: Grade 9 Chemistry (2)

Posted by Erika on Wednesday, June 20, 2012 at 9:02pm.

What is one way in which Noble Gases are different from other elements?
a. Noble Gases have low boiling points
b. Noble gases have high melting points
c. Noble gases have extremely high densities
d. Noble gases have unusually high atomic masses

Also, what is a 'valence energy level"?

All I know about noble gases is that they don't have any unpaired electrons in their 'valence energy levels', and that they are inert and do not react to form compounts.

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