# Quarks

Discussion in 'General Science & Technology' started by Beaconator, Jul 21, 2022.

1. ### BeaconatorValued Senior Member

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Are quarks the smallest particles because of their weight and size?

3. ### SeattleValued Senior Member

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Small relates to size, right? So what else could it be?

5. ### mathmanValued Senior Member

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Using mass as a criterion, electrons are smaller and neutrinos are a a lot smaller.

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7. ### James RJust this guy, you know?Staff Member

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If your question boils down to: "Is the thing with the lowest mass the least massive?" then the answer is "Yes".
If your question boils down to: "Is the thing with the smallest volume the one with the least size?", the answer is also "Yes".

8. ### BeaconatorValued Senior Member

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Actually there is… do you have the volume of every element? Stanford used to but they deleted it.

I really appreciate your use of volume.

so I’m guessing quarks are the most dense particles known.

Last edited: Jul 21, 2022
9. ### DaveC426913Valued Senior Member

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Depends on what you mean.

Atomic volume is defined as the volume of one mole (6.02214076 × 10^23 atoms) of a given element in a solid state.
It's not the volume of a single atom.

Apparently quarks are comprised of smaller particles called preons...

10. ### sideshowbobSorry, wrong number.Valued Senior Member

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In chemistry lab, I used to make a "Bohr model" of the atom:
I took a large beaker (8 inches) and put a smaller beaker (4 inches) inside it and I put them on top of a magnetic stirrer. Then I put a large stir bar (2 inches) inside the smaller beaker and a smaller one (1 inch) in the space between the beakers. If I adjusted the stirrer speed just right, the large bar would rotate slowly and the smaller on would orbit around it while spinning.

Then I threw a cork in. When people asked what that represented I told them it was a quork.​

11. ### DaveC426913Valued Senior Member

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That's kinda cool.

12. ### exchemistValued Senior Member

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Atomic radii are widely available for every element, e.g. on this version of the Periodic Table: https://ptable.com/#Properties

However these can only be estimates of a kind of "effective" radius, made by averaging interatomic distances in a range of chemical structures containing the element. That is because the electron probability distribution does not have any fixed outer limit: it just peters out progressively with distance from the nucleus, once the various nodes in the wave function have been passed.

13. ### BeaconatorValued Senior Member

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I’m wondering more along the lines of say you have two particles that are the same size and different weight. Which one would be the smallest?

14. ### SeattleValued Senior Member

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You've just said they are the same size. How can one be "smallest"?

15. ### sideshowbobSorry, wrong number.Valued Senior Member

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"Size" and "density" don't seem to be relevant at the subatomic level.

16. ### BeaconatorValued Senior Member

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Or perhaps nobody has devised a good way to measure that.

17. ### originHeading towards oblivionValued Senior Member

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Elemental particles do not have a size, they are point particles. Since point particles do not have a size they do not have a volume so they have no density.
Elemental particle do have mass so if you are interested just look up the mass of elemental particles. The mass of a down quark is more than the mass of an electron which has a higher mass than a neutrino... yadda..

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18. ### BeaconatorValued Senior Member

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So which is smaller? A photon or the Higgs boson?

shouldn’t it be the Higgs because it is the smallest particle with mass? Smallest stationary particle maybe?

Last edited: Jul 24, 2022
19. ### originHeading towards oblivionValued Senior Member

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A photon is an EM wave so you could say it's 'size' is related to the wavelength. So there is some 'size' to a photon. Bosons are point particles so they do not have a measurable size, therefore a photon is bigger. The obvious problem is that we are applying classical definitions to quantum objects so these descriptions are not exactly right.
No. The Higgs boson is not the smallest particle with mass as was just discussed in previous posts.
No. The Higgs boson is not the smallest particle with mass as was just discussed in previous posts.

20. ### BeaconatorValued Senior Member

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I thought a photon was a boson

21. ### James RJust this guy, you know?Staff Member

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A boson is any particle that has integer spin. Photons have spin 1, so they are bosons.

All particles have wave-like properties, as described by quantum physics. So, saying "a photon is an EM wave" is not quite right, in one sense, but completely correct in another.

22. ### originHeading towards oblivionValued Senior Member

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Thanks for the clarification/correction.

23. ### BeaconatorValued Senior Member

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So a captured photon in a hydrogen particle would have a distance of one as an ejected one could have been within the 1.01 to 1 distance

like bouncing a ball out of a canvass