Hi Don - Heavy metals are those which hurt your back when you pick them up!
(and that was a poor attempt at Monday humor).

Metallurgists have traditionally "categorized" metals into 4 divisions:

heavy metals - iron, copper, nickel, chromium, etc.
light metals - aluminum and magnesium, etc.
white metals - lead, tin, zinc, and cadmium, etc.
precious metals - gold, platinum, palladium, silver, etc.

The current "categorization" scheme usually has heavy metals as being those
elements which are toxic poisoning such as lead, cadmium, mercury, etc.
Heavy metals can have several definitions depending on your topic of
interest. Good luck.

Dave Hillman
Rockwell Collins
[log in to unmask]




[log in to unmask] on 03/30/98 01:38:51 PM

Please respond to [log in to unmask]

To:   [log in to unmask]
cc:    (bcc: David D Hillman/CedarRapids/Collins/Rockwell)
Subject:  [TN] Heavy metals




What are  heavy metals?


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      Don F. Fumia
      [log in to unmask]
   Schneider Automation
      No. Andover MA
   978-975-9344   FAX x9714
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