Why do the melting points of the transitional metals peak at 6B?

Subject: Why do the melting points of the transitional metals peak at 6B?

Date: Mon Sep 28 13:04:41 1998
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Area of science: Chemistry
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Re: Why do the melting points of the transitional metals peak at 6B?
The melting points of the transitional metals rise, peak at 6B, and 
then fall again.  The only explanation I have found is the molecular-
orbital theory or energy bands, but I can't find any information that 
directly says why this trend occurs.  Please help!  Thanks!

You replied that my question was unclear, and for me to clarify.  6B 
refers to column 6B on the periodic table.  The melting points of the 
transitional metals start low, steadily rise, peak at 6B (ie. 
chromium, molybdenum, and tungston have the highest melting point in 
their row) then the melting points decline.  So why does this occur?  
Why do chromium, molybdenum, and tungston have the highest melting 
points in their row?  Why do the melting points rise, peak, then 
decline?  Hope this clarifies, thanks.

Re: Why do the melting points of the transitional metals peak at 6B?

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