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 jaffaned
Joined: 2/23/2011
Msg: 1
unknown elementsPage 1 of 1    
i was just wondering,if all the naturally occuring elements were formed in stars ,as they turned one element into another on down the line.then might there be elements out there that were produced that didnt end up in our part of space?like elements from supermassive stars or colliding binary stars or whatever.just wondering?
 FrogO_Oeyes
Joined: 8/21/2005
Msg: 2
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unknown elements
Posted: 12/13/2011 1:25:16 AM
While it is possible that elements exist which are not found here naturally, it's not especially likely. Elements which haven't been documented are all relatively massive. The "periodic table" includes all possible elements, and it tops out with those which are most massive, least stable, and which are mainly known only from being created by us. Above those, I think there's a considerable gap before another stable [and very massive] element is possible, which makes it rather unlikely such things exist naturally.
 abelian
Joined: 1/12/2008
Msg: 3
unknown elements
Posted: 12/13/2011 5:38:31 AM

What type of elements are produced just before the event horizon of a black hole?

There's nothing special about the even horizon of a black hole from that standpoint.
 chrono1985
Joined: 11/20/2004
Msg: 4
unknown elements
Posted: 12/14/2011 12:17:06 AM
Well there is one aspect of space your ignoring. With radio telescopes linked up around the globe we have a virtual aperture the size of the Earth, yet we're still having trouble detecting planets. Space is freaking huge, not likely to find anything from down here unless it's very large or has a very large effect on stars near it.
 Sisyphus76
Joined: 11/13/2011
Msg: 5
unknown elements
Posted: 12/14/2011 4:29:11 PM
Mendeleev cracked the periodic table. In his first release there were empty spots reserved for elements that mankind had not discovered yet. But when we finally did find them, they were the exact atomic weight of the missing squares. There are no more missing squares.


Photo-spectrum analysis has proven that there are no other elements in the universe other than the ones on our periodic table.
 FrogO_Oeyes
Joined: 8/21/2005
Msg: 6
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unknown elements
Posted: 1/11/2012 10:57:39 PM


Photo-spectrum analysis has proven that there are no other elements in the universe other than the ones on our periodic table.


While this is true,

As worded, it's a logical impossibility. You cannot use lack of evidence as proof for non-existence.
 abelian
Joined: 1/12/2008
Msg: 7
unknown elements
Posted: 1/12/2012 11:13:38 PM
Should it actually manifest, it is a nucleus composed entirely of neutrons, no cap on size

Can't happen. The explanation is not so difficult to understand but it's a little long for this forum. However, if you're intersted, you can look up the deuteron which is an isotope of hydrogen consisting on one neutron an one proton (p-n_ in a particular spin configuration. As it turns out, neither the p-p or n-n system is bound and once you understand why that is so, you'll understand why a nucleus consisting of only neutrons is not bound.

and utterly homogeneous so utterly impervious.

That isn't true. Nuclear matter is very dense, but high energy accelerators study the constiuent quarks in the protons and neutrons through scattering experiments that probe the inside of nucleons.

(I don't think neutron stars lack protons, but I could be wrong).

That really wouldn't matter since neurton stars are not bound by nuclear forces, like nuclei are. Neutron stars are bound by gravity.

Some hypothesize the "Island of Stability" where the number of protons and neutrons fit together well enough so that maybe, just maybe, the nucleus won't decay. Can't recall the likely numbers right now.

Well it would decay, because when a nuclear physicist talks about a nucleus being stable, it doesn't really mean it doesn't devay. It means that it is actually bound to some extent by the strong nuclear force. In the shell model of the nucleus, there exist both proton shells and neutron shells. A nucleus with a closed shell is very stable. A nucleus with both a closed proton shell and closed neutron shell is extremely stable. (Subject to some other constraints that aren't really relevent here).

Shell closure occurs when thwe number of neutrons or protons is one of the so-called magic numbers, 2, 8 20, 28, 50, 82, or 126. For example He is doubly magic since it has 2 protons and 2 neutrons. 208Pb is doubly magic since it has 82 prpotons and 126 neutrons. The next shell closure above 126 would occur at around 184, so one might speculate that a nucleus 126 protons and 184 neutrons has a chance of being more stable than somewhat lighter nuclei. It's also possible that the closed neutron shell with 184 neutrons might make nuclei with fewer protons more likely to be stable. However, unlike the electromagnetic force, the nuclear force has a very short range - only about 1.4 x 10^-15 m (1.4 fm), which means that once a nucleus reaches a certain size, the nuclear force becomes saturated and adding more nucleons does not contribute to the overall binding of the nucleus, i.e., the nucleus tends to fall apart.

because if the pattern holds true, there would be 9 electrons in 2 possible states.

Electrons have absolutely nothing to do with nuclear binding.
 Kings_Knight
Joined: 1/20/2009
Msg: 8
unknown elements
Posted: 2/6/2012 9:39:03 AM

" ... might there be elements out there that were produced that didnt end up in our part of space? ... "


Yes. We hear discussions of it in quite hushed tones from time to time when people dare mention the possible existence of 'Unobtainium' ...
 xlmagboy
Joined: 6/28/2010
Msg: 9
unknown elements
Posted: 2/6/2012 11:10:08 AM
What exactly did scientists find in those moon rocks brought back from the moon? Not too long ago Nasa claims they are unaccounted for. Perhaps a worm was found that makes people lust as the moon does.
 Kings_Knight
Joined: 1/20/2009
Msg: 10
unknown elements
Posted: 2/6/2012 11:18:36 AM
@ Nr 16:

So your claim is that the OED operates in much the same fashion as Kelly Bundy's memory when she was preparing for the quiz show on 'Married With Children' ... ? I see ...
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