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Questions tagged [protons]

Protons are subatomic particles with the symbol p or p+. They have a positive electric charge of 1 elementary charge. Questions referring to interactions of protons in solutions should rather use the acid-base tag.

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Precipitating hydrochloric (salt) compounds out of aqueous solutions [closed]

I'm trying to find some literature on the subject of precipitating compounds that have been converted to a salt after being protonated with a strong acid (such as HCl, for example). I seem to be ...
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Why did J.J. Thomson observe protons in his cathode ray experiment?

In this MIT lecture, at 7:22, the professor says that when J.J. Thomson added a positively charged plate on one side of the cathode ray and a negatively charged plate on the other side, he observed a ...
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Why are the protons in the nucleus not repelled by each other? [duplicate]

Since we know that like charges repel each other and the protons in the nucleus have equal and like charges, but they are held intogether instead of being repelled. Why?
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Can there be any substance whose number of electrons and protons are different at neutral state

I want to ask that if there any substance that has the different number of electrons and protons at its neutral state
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Do bond lengths change upon protonation of a molecule such as an H2O molecule?

Wouldn't the hydrogen atom in a hydronium cation feel a greater proton repulsion force (nucleus-nucleus repulsions) from the oxygen atom and orient away from the oxygen atom to maximize the attractive ...
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How does protium fusion produce helium? [closed]

In stellar nucleosynthesis, how is helium produced from a protium atom that has no neutrons?
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Chemistry: A Chemical Dilemma [closed]

We accept that, via observations that an electron possesses a negative charge and a proton a positive charge, both of which attracting each another. My dilemma lies here, what is the reason for the ...
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1answer
163 views

positive rays ?? (What and why)

Question : We were recently studying the chapter on Atomic Structure and we had a topic about cathode rays and the single particle of a cathode ray is called cathode ray particle. The next topic ...
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Why do objects gain electrons? [duplicate]

I have read that objects gain electrons to become negatively charged and also that they lose electrons to become positively charged. I have also read that same charges repel each other and non-same ...
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60 views

How to experimentally measure number of protons or electrons in an element? [duplicate]

How can one measure the numbers of protons or electrons (the atomic number) in a substance? Like if the element I examine is carbon I expect the result to be 6. Preferable a simple experiment which ...
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1answer
40 views

What happens to the H electron during acid reaction?

In this generic acid-base reaction: $\ce{HX + B <=> X- + HB+}$ It's explained that the acid HX donates a proton H+ to its conjugate base HB+. What happens to the electron that was originally ...
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Is the reaction of calcium carbide with water a Brønsted-Lowry acid-base reaction or Lewis acid-base reaction?

Consider the following reaction: $$\ce{CaC2 + 2H2O -> Ca(OH)2 + 2C_{2}H_{2}}$$ If it can be considered as an acid-base reaction, is it a Brønsted-Lowry (B.L.) reaction or a Lewis reaction? If it ...
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In helium-2, would each electron experience a single positive charge from the nucleus?

If we have an atom of hydrogen-1, we know that there exists one proton with one electron and in helium-2 two protons with two electrons. My question is that do protons get shared equally with ...
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Formation of Hydrogen - from a proton and an electron [closed]

If I place a proton and an electron close to each other, can they form an atom of hydrogen? Why or why not? Please explain the scenarios where this is not likely/unlikely. Personally I doubt it, ...
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Effective Nuclear Charge of Noble Gases

As stated in my textbook, the effective nuclear charge can be calculated by taking the non-valence electrons away from the atomic number, as also stated in the first calculation on Wikipedia: https://...
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Can it be said that on our planet we have roughly the same number of electrons as we have protons?

My question is quite simple I think. Is it true that we have approximately the same number of electrons as we have protons and the average electric charge of the molecules in our planet is roughly ...
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Proton leak during ATP synthesis

I was told there is a proton leak during ATP production. When going through the mechanisms we went over in class, I was unable to find when this occurs. During what part of ATP production is there a ...
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125 views

How right is defining elements with the number of protons? [closed]

Atomic number is the number of protons a certain atom has. It's the defining attribute of a certain element. But, How right is that? From the viewpoint of chemistry, the definition is right. Because, ...
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586 views

What is the proton NMR spectrum of p-methoxyphenol?

I think there will be two pairs of doublets, since the hydrogens adjacent to the $\ce{OCH3}$ and those adjacent to the $\ce{OH}$ group will be in different environments. The answer, however, is that ...
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Does firing a proton beam on water make it acidic?

Lets say I fire a proton beam upon the surface of water. Lets assume I do the experiment in an air-free environment and that the proton beam doesn't reflect off the surface of water. Now, protons, ...
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1answer
52 views

On what basis can we say that one nuclide is more stable than another one? [closed]

I read in a textbook that the nuclide $^{40}_{20}\ce{Ca}$ is more stable as compared to $^{30}_{13}\ce{Al}$. I checked it online and saw that most sources describe the observation with respect to odd ...
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130 views

how do protons in the nucleus of an atom overcome repuulsions [duplicate]

Why don't protons present in the nucleus of an atom repel each other being likely charged ?
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Is an acid (just) a proton donor and if not, what is the correct definition of an acid?

Why is acid called proton donor? On the internet, I found: Acids are substances that can donate $\ce{H+}$ ions to bases. Since a hydrogen atom is a proton and one electron, technically an $\ce{H+}...
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Comparing energies of isoelectronic species, but one protonated

Let's say we have the following reaction: $$\ce{RH -> R- + H+}$$ By modelling it using quantum chemical calculations in the gas phase I would make calculations for both $\ce{RH}$ and $\ce{R-}$, ...
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1answer
876 views

If the atomic number is # of protons, why does emission of a beta (electron) particle increase the atomic number?

Atomic number: the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table. Beta emission: $$\ce{^14_6C -> ^14_7N ...
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Mechanism Permitting Proton Sponge Effect

The proton sponge effect is utilized as a drug delivery method to release contents packaged in micelles (usually coated in PEG or another protective polymer) into the cytoplasm of a cell after being ...
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Why does q/m ratio(specific charge) depend on nature of gas in anode ray experiment?

I can't understand why $q/m$ ratio changes in anode ray experiment (discharge tube experiment) (which was carried out by Goldstein) with change in nature of gas? Since $q=1.6\times10^{-19}\ \mathrm C$...
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How does one find the probability of tunneling along a reaction coordinate computationally?

The idea for this question comes from Jan's comment over here. I realized I don't know how I would compute the probability of tunneling in the process of a reaction. When I say "compute" I don't mean ...
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1answer
288 views

What is the reason why protons and electrons do not collide?

can someone give me an intuitive picture of why electrons don't collide with protons? I know that electrons move in a sort of cloud, which is our 'orbital', and that they mainly behave like ...
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4k views

Why do acids donate protons?

I would have thought the answer to this question would be simple, but after searching this site I was unable to find any answers. I know Brønsted-Lowry acids are defined in terms of proton donation, ...
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Alternative to a proton [closed]

I know I might sound terribly stupid but the idea just hit me. We define elements on the periodic table as "lumps" of matter with specific amount of specific particles (electrons neutrons and protons) ...
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503 views

How do valence shell configurations affect attraction and repulsion forces between atoms? [closed]

It seems clear that the electrons of one atom are attracted to the protons of another and that this is the source of attractive forces between atoms. However, it is not clear why an atom with a full ...
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Protons and the Heisenberg principle

The Heisenberg uncertainty principle implies that it is not possible to calculate the position and velocity of a body at the same time accurately. Electrons follow this principle since their orbitals ...
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Will adding up protons and electrons (without neutrons) create a new element?

If protons have a positive charge and electrons have a negative charge, can we add up several protons and electrons together to create a new element, without adding neutrons to hold the nuclei ...
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How do scientists count the exact number of electrons, protons, neutrons in the atom? [duplicate]

An atom is very small so it is probably difficult to focus exactly on a single atom. I wonder how scientists count the exact number of electrons, protons, neutrons in an atom of a certain element. ...
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Deducing compounds from spectroscopic data for isomers of formula C4H8O

Here's the problem: I've already know the 3600 cm$^{-1}$ line indicates the $\ce{-OH}$ group and the 1640 cm$^{-1}$ line indicates the C double-bond C alkene. From the $^{13}$C NMR data: the two ...
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Element with No Proton?

On seeing this graph closely I noticed the there a element with no proton. But with no proton there will be no electron too and don't think that an lone neutron would form an element. So is that given ...
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Confused about strong/weak dibasic and tribasic acids?

I know that sulfuric acid is considered a strong acid, and the dissociation of its first H+ ion is complete and of its second H+ ion is partial. Phosphoric acid is weak and all three of its H+ ions ...
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How were the absolute masses of atoms calculated before the mass spectrometers?

I understand that true (non-relative) masses of atoms are calculated with a mass spectrometer. using this relationship: Centripetal Force = Force due to magnetic field(B) But I was wondering how ...
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Why do the two methylene protons in ethylbenzene have a chemical shift at 2-2.9?

The data sheet does not have any chemical shifts in this range for compounds containing only carbon and hydrogen
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675 views

Spin spin coupling in a proton NMR of an ester?

I am learning about proton NMR and spin-spin coupling, and am confused about whether splitting occurs over an ester bond. Specifically, in the case of ethyl methanoate, HCOOCH2CH3, if I were to number ...
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Periodic trends: why is effect of protons greater than electrons?

Why is it that adding protons has a greater effect than electron-electron repulsion on periodic trends like atomic radius and ionization energy (assuming # of shells constant)? It seems that if ...
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537 views

Can protons be swapped in a chemical reaction?

Can the protons of two elements be swapped in a chemical reaction?
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2k views

Protons or electrons are responsible for chemistry of an atom?

Is the question in a correct form? I can't add anything as a comment. Thank you.
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Can a proton be ejected from an atom?

Consider a neutral atom that has $n$ protons and $n$ electrons. Is it possible to remove a proton from the atom via some technique such as bombardment with another particle or applying an appropriate ...
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Does H3O+ donate a H+ to Water?

Does the hydronium ion donate a proton to water? If the collision of 2 molecules of water can cause a proton to be transferred, does hydronium 'pass' a proton to water?
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Why weren't the electrons attracted to doubly charged Helium particles in the Rutherford experiment?

I have a chapter and in it there was a topic on the Rutherford experiment. It is written that doubly charged helium particles or alpha particles were thrown towards a very thin gold foil and some of ...
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Quotable Literature for the Enthalpy of a Proton

A proton obviously has no electronic energy, no vibrational and no rotational degrees of freedom. Therefore I think it is fair to assume, that $$H(\ce{H+})=\frac32\cdot \mathcal{R}\cdot T$$ holds for ...
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Is it possible to compress an atom to infinite density? [closed]

I know, by nature, normally atoms are stable. But I wonder, if it is possible to compress an atom, say the Hydrogen atom, to infinite density by applying external force? After all, electrons and ...