The subatomic tag has no wiki summary.
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Degeneracy of orbitals in magenetic field
Why is that in an external magnetic field(uniform) the degeneracy of d,f orbitals is lost but the degeneracy of p orbitals remain intact assuming the main cause of losing degeneracy is the difference ...
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2answers
67 views
Alpha particle and helium nucleus
The symbol for the alpha particle is α or $α^{2+}$, it can be written as $He^{2+}$.
What I want to know is that, are they same? I mean alpha particle and helium nucleus are same or any subtle ...
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42 views
Proton scattering off electrons
I'm looking at a question which starts off as:
A proton is travelling through a material and scattering the electrons in the material. Express the scattering angle in terms of the impact parameter, ...
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1answer
62 views
What would be the effect of an excess of up quarks on stellar formation?
Suppose you had 80% up quarks, and only 20% down quarks. How would this affect stellar formation?
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1answer
155 views
Huge confusion with Fermions and Bosons and how they relate to total spin of atom
I am supremely confused when something has spin or when it does not. For example, atomic Hydrogen has 4 fermions, three quarks to make a proton, and 1 electron. There is an even number of fermions, ...
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1answer
99 views
The Value of Newton's Gravitational Constant $G$ within an Atom
Can the value of Newton's Gravitational Constant $G$ be measured within a stably bound atom?
PLEASE NOTE: Since scattering experiments do not involve stably bound systems, their results are not ...
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2answers
124 views
Energy source of electrons?
I am aware that electrons are moving in an empty space so basically there is no friction to slow it down and its velocity stays the same. However where did the electron get its energy from in the ...
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1answer
136 views
Explanation on Atomic Orbitals and Molecular Orbitals
We were reading about atomic structures and bond making and my teacher told me that when two atoms are fused or when they make bond, There are two orbitals formed. 1-Bonding Molecular Orbital & 2- ...
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2answers
114 views
How can Sub-Atomic Particles be Visualized?
Can you see or accurately visualise sub atomic particles or are they known only by maths and/or inference?
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32 views
Could the quantity mass in the whole galaxies decrease to zero if all particle in the galaxies convert into subatomic particle? [closed]
Could the quantity mass in the whole galaxies decrease to zero if all particle in the galaxies convert into subatomic particle?
How does your statement work?
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6answers
310 views
What would be likely to completely stop a subatomic particle assuming it was possible?
Suppose that completely stopping a subatomic particle, such as an electron, could happen under certain conditions. What would be likely ways to get an electron to be perfectly still, or even just stop ...
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69 views
Wondering about what would happen if all the atoms in the univerise scatter into proton and neutron? [closed]
What if the all the atom in the universe scatter into proton and neutron?In another word, would the all the matter in the universe disappear?
Inspire by the answer of one of my question: A question ...
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1answer
79 views
A question on the property of proton and neutron? [closed]
The NOVA show on the string theory have mention once that the proton and neutron will be disappear in finite amount of time, then reappearing on somewhere else. Is there any experiment have shown that ...
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2answers
232 views
Looking for a list of possible subatomic particle collisions
This is going to be a strange question, but here we go. I'm working on a computer puzzle game that will simulate subatomic particle collisions. I am not a physicist by training, but I do dabble. I ...
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4answers
358 views
Intrinsic structure of electron
The electron contains finite negative charge.The same charges repel each other.What makes electron stable and why does it not burst? Is it a law of nature that the electron charge is the smallest ...
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1answer
192 views
Anti-Matter for Neutrons
The anti-particle corresponding to a proton or an electron is a particle with an equal mass, but an opposite charge. So what is the anti-particle corresponding to a neutron (which does not possess a ...
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1answer
1k views
Anomalous Expansion Of Water
How can the Anomalous Expansion of Water from 4$^\circ$C to 0$^\circ$C be explained with reference to subatomic particles?
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1answer
337 views
The Nucleus of an Atom
We know that the protons in a nucleus are positively charged, whereas the neutrons do not possess a charge; we also know that unlike charges attract. So why does the nucleus stay intact, even though ...
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0answers
27 views
How can we know about particle spin? [duplicate]
Possible Duplicate:
How does one experimentally determine chirality, helicity and spin?
This is a rough quite from Hawking:
"An elementary particle with 0 spin looks the same no matter ...
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1answer
797 views
Why are electrons and quarks 0-dimensional?
Disregarding String Theory, which says that electrons and quarks are 1-dimensional, why are electrons and quarks 0-dimensional?
The way I look at it is that they have mass, and if we were the same ...
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2answers
201 views
How can particles being closed strings in String Theory create solidity in objects?
I understand how particles with certain masses can form to make atoms, which create solidity in objects due to Pauli's Exclusion Principle and what have you. These particles actually have mass and to ...
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6answers
4k views
What does it mean for two objects to “touch”?
If you've ever been annoyingly poked by a geek, you might be familiar with the semi-nerdy obnoxious response of
"I'm not actually touching you! The electrons in the atoms of my
skin are just ...
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1answer
6k views
What did Marie Curie do for atomic theory?
There appears to be a distinct lack of agreement in the physics community on what exactly Marie Curie did for atomic theory.
Many journals state that Curie was responsible for shifting scientific ...
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1answer
2k views
Are all electrons identical?
Why should two sub-atomic (or elementary particle) - say electrons need to have identical static properties - identical mass, identical charge? Why can't they differ between each other by a very ...
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2answers
7k views
What is in the space between a nucleus of an atom and its electrons?
There is a common analogy about the structure of an atom, such as the nucleus is a fly in the centre of a sports stadium and the electrons are tiny tiny gnats circling the stadium (tip of the hat to ...
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4answers
735 views
Why does amount of protons define how matter is?
My question might sound convoluted but my mind is twisting right now so my apologies in advanced.
Why is it that when I have one proton and one electron it is Hydrogen a clear flammable gas, and ...
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1answer
170 views
Paramagnetism what about Paraweakism or Parastrongism?
Ok, I was just curious but the electromagnetic force can allow paramagnetism macroscopically in some objects. Can this be done microscopically to the subatomic level? Also, what about other forces ...
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1answer
669 views
Why are there 3 quarks in proton?
A few quark related questions (I don't knowmuch about them other than there are 2 flavours concerning protons and neutrons)
Why are there 3 quarks in a proton or neutron? Why not 2 or 4?
Is there an ...
