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-   -   The Elements (https://www.mersenneforum.org/showthread.php?t=13646)

science_man_88 2010-07-23 23:18

The Elements
 
This is a book by Theodore Gray(copyright 2009), in it are multiple errors even I the idiot can pick out for one it shows coppers melting point to be below 0 on it's temperature scale, second it list technetium and promethium as the 2 exceptions to the fact that all elements [U]below[/U] bismuth are stable but they both have atomic numbers< bismuth hence they are above it.

cheesehead 2010-07-24 04:21

[quote=science_man_88;222633]second it list technetium and promethium as the 2 exceptions to the fact that all elements [U]below[/U] bismuth are stable but they both have atomic numbers< bismuth hence they are above it.[/quote]The book is correct there. Perhaps you have confused the meanings of "below" and "above" in this context.

"Below" in this context means having a lesser atomic number, not being vertically farther "down" on the two-dimensional periodic table in the orientation with which it's usually displayed. Hydrogen is "below" every other element.

science_man_88 2010-07-24 12:06

that phrasing should be abolished I think as it never got told that was it in any chemistry class I ever took.

what about the copper melting below 0 Celsius ? according to Wikipedia it melts at over 1000 Celsius and that's quite a big lie if the book is accurate.

10metreh 2010-07-24 12:59

Most people don't need Wikipedia to check that copper melts above 0 Celsius.

science_man_88 2010-07-24 13:02

[QUOTE=10metreh;222660]Most people don't need Wikipedia to check that copper melts above 0 Celsius.[/QUOTE]

I didn't either but I just give references that show above 0 is accurate but below is crazy unless it's at a high pressure.

retina 2010-07-24 13:07

Can I guess that it says the melting point is -38.83 °C? Possibly mixed up with mercury.

science_man_88 2010-07-24 13:12

1 Attachment(s)
[QUOTE=retina;222662]Can I guess that it says the melting point is -38.83 °C? Possibly mixed up with mercury.[/QUOTE]

I can't tell it shows it in a scale on the side with 500 degree increments marked.

looks to me like 91 K but that's only a guess.

10metreh 2010-07-24 14:30

[QUOTE=science_man_88;222661]I didn't either but I just give references that show above 0 is accurate but below is crazy unless it's at a high pressure.[/QUOTE]

There is a basic error in this statement. I leave it to you to find it.

science_man_88 2010-07-24 14:37

if it's punctuation I don't care almost nobody I know does everything accurately.

10metreh 2010-07-24 14:45

[QUOTE=science_man_88;222669]if it's punctuation I don't care almost nobody I know does everything accurately.[/QUOTE]

No, it's not punctuation, spelling or grammar.

firejuggler 2010-07-24 15:09

very low pressure maybe?
remember.. water boil at 95 °C high in the mountain


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