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Old 2006-03-02, 22:14   #1
davar55
 
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Default Elemental Puzzle #2

What do these five elements (and no others) have in common?

Bh, Cm, Fm, He, No
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Old 2006-03-04, 07:28   #2
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Here's the atomic numbers for those who don't have Bh or other recently named elements on their charts.
Bh(Bohrium):107
Cm(Curium):96
Fm(Fermium):100
He(Helium):2
No(Nobelium):102

Is Bh even an official name yet? (Official means in this context accepted by phyics societies/atomic energy authorities)
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Old 2006-03-04, 10:06   #3
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It seems that the International Union of Pure and Applied Chemistry (IUPAC) (http://www.iupac.org/index_to.html) is the organization that officially names chemical elements. (It also sets the standards for naming chemical compounds and publishes official atomic weights, and bunches of other stuff -- see "IUPAC Nomenclature Home Page" at http://www.chem.qmul.ac.uk/iupac/.)

Apparently, as of 2001 (http://www.chem.qmul.ac.uk/iupac/AtWt/) the following symbols and names were official:

107 Bh Bohrium
108 Hs Hassium
109 Mt Meitnerium
110 Ds Darmstadtium
111 Rg Roentgenium

Wikipedia's "Element naming controversy" at http://en.wikipedia.org/wiki/Element_naming_controversy is interesting.

WebElements at http://www.webelements.com/, authored by Mark Winter [Department of Chemistry, University of Sheffield, England], "aims to be a high quality source of chemistry information on the WWW relating to the periodic table. Coverage is such that professional scientists and students at school interested in chemistry and other sciences will all find something useful."
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Old 2006-03-04, 10:30   #4
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Quote:
Originally Posted by davar55
What do these five elements (and no others) have in common?

Bh, Cm, Fm, He, No
Hmmm ... Inclusion of helium rules out lots of possibilities. Not all named for people. No common chemical properties I can see. Times, places, and manners of discovery are spread around.
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Old 2006-04-19, 16:58   #5
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Well, to resurrect this ...
The connection I have in mind has strictly to do with
the NAMES of the five elements.
Does that help?
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Old 2006-05-09, 10:40   #6
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Well, Helium never one a Nobelprize.
Nobel did neither, but then again, he brought in the money for the prize and gave his name to it.
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Old 2006-05-10, 20:01   #7
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Quote:
Originally Posted by Kees
Well, Helium never one a Nobelprize.
Nobel did neither, but then again, he brought in the money for the prize and gave his name to it.
Einstein won a Nobel prize, but Es is not in the list.
Paul
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Old 2006-05-11, 07:03   #8
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So did Rutherford and Rontgen...
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Old 2006-05-22, 02:36   #9
davar55
 
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Cool

My solution has to do with the names minus -ium ...
(bore,cure,firm,heal,noble -- homonyms of common words).
-- davar55
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Old 2006-05-22, 07:41   #10
xilman
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Quote:
Originally Posted by davar55
My solution has to do with the names minus -ium ...
(bore,cure,firm,heal,noble -- homonyms of common words).
-- davar55
Best suggestion I've heard so far, but doesn't really explain the absence of Cr, Ce and Be from the list. There may be others I've missed.


Paul
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Old 2006-05-26, 01:17   #11
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OK The puzzle is now:

What do these seven (and no other) elements have in common?

Bh,Ce,Cm,Cs,Fm,He,No

-- davar55
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