Elemental Puzzle #2
 

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

Bh, Cm, Fm, He, No

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)

It seems that the International Union of Pure and Applied Chemistry (IUPAC) ([URL="http://www.iupac.org/index_to.html"]http://www.iupac.org/index_to.html[/URL]) 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 [URL="http://www.chem.qmul.ac.uk/iupac/"]http://www.chem.qmul.ac.uk/iupac/[/URL].)

Apparently, as of 2001 ([URL="http://www.chem.qmul.ac.uk/iupac/AtWt/"]http://www.chem.qmul.ac.uk/iupac/AtWt/[/URL]) 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 [URL="http://en.wikipedia.org/wiki/Element_naming_controversy"]http://en.wikipedia.org/wiki/Element_naming_controversy[/URL] is interesting.

WebElements at [URL="http://www.webelements.com/"]http://www.webelements.com/[/URL], authored by [URL="http://winter.staff.shef.ac.uk/"][B][COLOR=#003399]Mark Winter[/COLOR][/B][/URL] [[URL="http://www.shef.ac.uk/chemistry/"][COLOR=#003399]Department of Chemistry, University of Sheffield[/COLOR][/URL], 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."

[quote=davar55]What do these five elements (and no others) have in common?

Bh, Cm, Fm, He, No[/quote]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.

Well, to resurrect this ...
The connection I have in mind has strictly to do with
the NAMES of the five elements.
Does that help?

Well, Helium :banana: never one a Nobelprize.
Nobel did neither, but then again, he brought in the money for the prize and gave his name to it.

[QUOTE=Kees]Well, Helium :banana: never one a Nobelprize.
Nobel did neither, but then again, he brought in the money for the prize and gave his name to it.[/QUOTE]Einstein won a Nobel prize, but Es is not in the list.
Paul

So did Rutherford and Rontgen...

My solution has to do with the names minus -ium ...
(bore,cure,firm,heal,noble -- homonyms of common words).
-- davar55

[QUOTE=davar55]My solution has to do with the names minus -ium ...
(bore,cure,firm,heal,noble -- homonyms of common words).
-- davar55[/QUOTE]
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

OK The puzzle is now:

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

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

-- davar55