2007-11-04 23:12:57 · 13 answers · asked by Kirsty l 1 in Science & Mathematics ➔ Physics
Yes actually. For example, all electrons are identical. That the pauli exclusion principle applies is evidence of this. If two electrons were different in any way, they could occupy the same quantum state.
Identical bosons do even wierder stuff. Superfluidity of bosons (like He-4) is evidence that they can be identical.
2007-11-04 23:21:58 · answer #1 · answered by Anonymous · 4⤊ 2⤋
As usual, it all depends on what you mean by "identical". If you mean "exactly the same", then obviously not because if they are exactly the same then they are the same thing - and are only one thing.
However, if you mean it in the more common sense of indistinguishable (as in identical twins) then I think the answer is yes. Although electrons cannot share the same QM state and so are distinguishable in principle (being fermions - a class of particle), there are sub-atomic partcles which can share a QM state becuase they have no spin. They are known as bosons. Examples are photons, He-4 atoms.
This has real measurable consequences. For example, He-4 (a boson) behaves very oddly when cooled to near absolute zero and very differently from He-3 (a fermion).
2007-11-05 01:32:45 · answer #2 · answered by greenshootuk 6 · 1⤊ 0⤋
It depends on how you mean identical. An atom of Helium is an atom of Helium. An atom of Oxygen is an atom of Oxygen. You won't find all the electrons in exactly the same place because they are moving.
A proton is a Proton, you can't tell any difference between any two. I suppose that you could consider elementary particles of the same kind identical for all practical purposes.
2007-11-04 23:23:35 · answer #3 · answered by Deirdre H 7 · 2⤊ 0⤋
An Hydrogen atom is identitical in its nature only . Just as Humans are identical in nature. However intrinsically there exists continual. variations. One hydrogen atom may receive more heat energy than the other so at any time each atoms is diferent in terms of mass and volume.
So things may exist as identical in nature but not intinsically.
Therefore no two or more things are really identical.
So Flakes are all Crystall formation but none are identical intrinsically.
That means that perfect symmetry does not really exist in the practical world.
2007-11-04 23:41:29 · answer #4 · answered by goring 6 · 1⤊ 2⤋
no, there's none, even identical twins have some minor difference, there's no 2 identical things in the world
2007-11-04 23:28:49 · answer #5 · answered by Anonymous · 0⤊ 2⤋
Yes, if you don't look too closely.
I suspect if you were able to look closely enough you might find differences between electrons.
Entangled electrons (or photons) might be the same.
One thing that does point for things all being different is the idea from quantum mechanics that we can not make perfect copies of stuff without altering or destroying the original.
2007-11-04 23:37:06 · answer #6 · answered by Graham P 5 · 1⤊ 2⤋
What about identical twins even their DNA is the same but for some reason they can think diffrently from each other and one could get fat and one might not hummmm and no i don't know the answer to that one sorry!
2007-11-04 23:22:14 · answer #7 · answered by ? 6 · 0⤊ 2⤋
I would think that atoms of a particular element are identical, but I have no way to confirm it.
2007-11-04 23:26:37 · answer #8 · answered by nottwoshort 4 · 1⤊ 1⤋
letters typed on a computer screen
2007-11-04 23:22:10 · answer #9 · answered by Anonymous · 1⤊ 1⤋
My brain and my good looks,
none of them work lol
2007-11-04 23:29:47 · answer #10 · answered by Anonymous · 0⤊ 2⤋