Re: gEDA-user: Isopropyl alcohol vs. ethanol

[Marvin Dickens <marvindickens@xxxxxxxxxxxxx>]

ldoolitt@xxxxxxxxxxxxxxx wrote:
> Marvin -
>
> On Mon, Apr 24, 2006 at 11:42:35AM -0400, Marvin Dickens wrote:
>   
> > issue if the boards were properly washed and dried. Factoid:, sodium
> > is one the most common elements, if not the most common element here on 
> > earth (As well as other places in the universe). Its the reason
> > most flames burn with a yellow color - Sodium is in everything.
> >     
>
> In the earth's crust:
> 1.   46.6%  Oxygen
> 2.   27.7%  Silicon
> 3.    8.1%  Aluminum
> 4.    5.0%  Iron
> 5.    3.6%  Calcium
> 6.    2.8%  Sodium
>
> http://hyperphysics.phy-astr.gsu.edu/Hbase/tables/elabund.html
>
>     - Larry
>
>   
Well, perhaps not the most common element, but it is number 6. When I
wrote the email, I was thinking back to my qualitative/quantitative 
chemistry classes in college some 25 years ago. I distinctly remember 
sodium posing a contaimination issue/problem for classmates who did not 
have good lab hygene - Bad hygene would cause unknowns to test positive 
for it even though orgrinally no sodium was present.


Best


Marvin