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July 2018

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Subject:
From:
George Wenger <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, George Wenger <[log in to unmask]>
Date:
Fri, 13 Jul 2018 09:23:10 -0400
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If you said it was "Bright Lead" I would agree but if you said it was "Black Lead" you're wrong.  However there are lots of people doing soldering who all wish they would put Lead back into solder.

Lead is a chemical element with symbol Pb (from the Latin plumbum) and atomic number 82. ...... tin was often not distinguished from lead: Romans called lead plumbum nigrum ("black lead"), and tin plumbum candidum ("bright lead").

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Carl Van Wormer
Sent: Friday, July 13, 2018 8:58 AM
To: [log in to unmask]
Subject: Re: [TN] Element Quiz Question

I think it is Lead (right Lealand?)
Please put it back in my solder . . . and give me the flux that smells good!


Carl B. Van Wormer, P.E., AE7GD
Senior Hardware Engineer
Cipher Engineering LLC
    21195 NW Evergreen Pkwy Ste 209
    Hillsboro, OR  97124-7167
    503-617-7447x303
    [log in to unmask]     http://cipherengineering.com


-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of David Hillman
Sent: Friday, July 13, 2018 4:58 AM
To: [log in to unmask]
Subject: [TN] Element Quiz Question

 The Question:
This element was known to ancient civilizations (at least 5500 BC). A pure bar of this element will "cry" when bent due to the twinning of its crystal structure. One of the early Latin words for this element was "plumbum candidum". A major commercial application for a compound containing this element is the stabilization of PVC plastics.The International Maritime Organization has a worldwide ban of a compound containing this element.
Which element is being described?

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