All Questions
16
questions
0
votes
1
answer
273
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How electron, proton and neutron have mass numbers
As far as I know, the mass number of an atom means the amount of protons and neutrons it has. For example, the mass number of Sodium (Na) is 23 since it has 11 protons and 12 neutrons. Then how ...
0
votes
2
answers
37
views
Number of neutrons per same weight samples
I've stumbled on this question that I can't seem to figure the answer of:
Which of the following 4 samples contains the least number of neutrons, considering that they all have the same mass.
...
- 103
0
votes
3
answers
978
views
What is the SI unit for the mass of subatomic particles?
Question:
What is the SI unit for the mass of subatomic particles?
Notes:
The weight of a proton is about $1.7 \cdot 10^{-24}\mathrm g$. This is the same as 0.0000000000000000000000017 grams. This is ...
0
votes
1
answer
395
views
Why are atomic nuclei protons and neutrons, and not electrons and neutrons or protons and neutrons
Wouldn't proton-electron nuclei be more stable since they attract each other and aren't just neutral to each other? What is the reason for this? I tried searching for an answer but couldn't find ...
- 25
6
votes
4
answers
2k
views
What is Binding energy, actually?
I have read from my textbook about binding energy but it indicates two completely different ideas.I am listing them below:
Definition (1):
"Binding Energy : An atomic nucleus is a stable ...
- 178
-1
votes
2
answers
1k
views
Why will the number of neutron higher than the number of proton in the most of atom? [duplicate]
The chinese website said :
In the most of atom,the number of neutron higher than the number of proton
Does anyone know the reason?just explain it in easier way,
Or does anyone know if the number ...
- 101
-1
votes
1
answer
85
views
Explain what I did hear in the TV? [closed]
I heard in the TV that the invention of the neutron was very dangerous and with it, we were able to hit the heart of the atom to destroy it to make explosion.
Like ...
2
votes
2
answers
246
views
What happens to the electron when a neutron knocks off a proton from hydrogen atom?
In recoil proton scintillators, the hydrogen acts as a neutron converter to produce protons when a neutron strikes a H atom. But what happens to the electron in H atom? Where does it go? Does it ...
- 325
0
votes
0
answers
167
views
What is the upper limit for the size of an atom? [duplicate]
I read an article saying an Israeli scientist had discovered the heaviest nucleus with 122 protons and 170 neutrons, and found it in a sample of purified thorium, and I would like to know if there are ...
- 13k
1
vote
3
answers
583
views
formation of atomic nuclei from nucleons
What holds the nucleus together? In a nucleus there are several
protons, all of which are positive. Why don't they push themselves
apart? It turns out that in nuclei there are, in addition to
...
- 7,203
3
votes
2
answers
287
views
What happens to molecules when a neutron is captured?
What happens to a molecule during neutron capture? Does the process release enough energy to break the molecule bond? In fission this is obviously the case, since the compound nucleus forms and then ...
- 33
3
votes
3
answers
6k
views
Why does a "typical" hydrogen atom have no neutron?
There are quite a few sources (mostly high-school physics textbooks) that I've read which don't give the disclaimer that the hydrogen atom they are using in a diagram is an isotope (as in having ...
- 1,493
1
vote
1
answer
196
views
Atomic radii for elements as hard spheres
In neutron scattering, the atoms in a system are considered as hard spheres. Where could I find the appropriate (reliable) values of the atomic radii consistent with this physical picture? Thank you ...
- 153
3
votes
3
answers
6k
views
How does the number of electrons and protons determine the melting point and hardness of a solid?
How does the number of electrons, neutrons and protons determine the melting point and hardness of a solid/metal?
And is it possible to create custom elements which is very strong and have very high ...
- 1,925
1
vote
0
answers
95
views
How does beta+ decay actually occur? [duplicate]
I'm having difficulty in understanding beta plus decay. How can a proton which has slightly less mass than neutron transform into a neutron, positron and neutrino?
Form where does the extra mass for ...
- 3,905