Electrons Definition and 998 Threads

Hello everyone, I would like to ask a couple of questions related with the interaction mechanisms of photons and electrons with matter. Through searching about this subject, I have concluded that they both have different penetration depth and different interaction mechanisms. But apart from...

I'm not sure if this question has already been answered yet. I was curious what factors effect the resistance of electrons moving through a wire? From the formula R = p*(L/A) i see mathematically why but I'm curious to the theoretical. Does an increase in cross sectional area decrease the...

In my physics class we are learning about certain frequencies of light hitting and "liberating" electrons, but we didn't go into any detail about what "liberating" the electron means. Can somebody explain?

Homework Statement Two electrons start at rest with a separation of 5.0 x 10^-12 m. Once released, the electrons accelerate away from each other. Calculate the speed of each electron when they are a very large distance apart (Ee = 0). Homework Equations EE = kQq/r Ek = (1/2)mv2 The Attempt at...

So I've already got some help on this one, now I have a different question pertaining to this equation. I know N=q/e e=-1.6x10^-19 q=-15x10-6 so I tried: N=(-15x10-6)/-1.6x10^-19 N=-156/-1.6x10^-19 N=9.74 ~that was wrong So I thought maybe this: N=(-15x10-6)/-1.6x10^-19 N=--60/-1.6x10^-19...

Im trying to wrap my head around this. If a photon of the right energy hits an atom's electron (hydrogen e.g) it jumps to the next orbital shell, then goes back down to conserve energy releasing a photon in the process. is this how we see the atoms in everyday matter? by the switching of the...

Homework Statement Calculate the wavelength of electrons traveling at 1.15x10^5 m/s Homework Equations λ = h/m*v Given values: h=6.626x10^-34 J*s m=9.11x10^-31kg v=1.15x10^5 m/s The Attempt at a Solution I converted J*s to SI units (kg⋅m2⋅s−2) and then substituted out all known values, to...

if in a hydrogen atom the electron is in a excited state, is the net charge the same vs ground state? what is the difference between charge and energy here? thx

If there is only one resistor, the voltage drop is equal to the potential of the positive terminal. The voltage drop across more than one resistor is directly proportional to the value of each resistor. But the total drop in potential difference must be equal to the potential of the positive...

when the external electrical potential difference is applied across the conductor ,electrons flow in the direction opposite to the current.Whether the number of free electrons in the conductor decrease? I think ,No.As electrons return ,because they move in closed loop.

Independent research person who is working with Type II Superconductors. Would enjoy talking with fellow research people to discuss the fine details of Type II materials, specifically electrons and energy.

Hello everyone, the purpose of my question is to find out the way to separate AUGER from secondary electrons. I think? i know the way that each of them is produced but i cannot figure out how can we separate them since both come out of the surface of our material in a SEM let's say experiment...

A little background: I'm only a high school student with some knowledge on Lewis dot structures. And I don't know much about the s orbitals or p orbitals or whatnot. Why are there lone pairs? Shouldn't the electrons repel each other? Why do we draw them as pairs? For example: carbon dioxide is...

Hi All, Lets assume, we have piece of cubic copper of side length 1 cm metal with neutral charge, so: 1) The free electrons in this piece of copper exist everywhere as waves? , each electron with its quantum state. 2) On applying an external electric field the wave-function collapse and they...

this is theoretical (and possibly stupid) question; accelerating protons would create an EM wave equivalent to an EM wave generated by electrons at same frequency but the amplitude would be opposite, is that possible. has anyone made a communication circuit from accelerating protons? are...

If there are three electrons associated with each other in some kind of magnetic trap then will the middle electron be able to move freely towards either of the outer electrons or will the middle electron be held equidistant between the two outer electrons?

If electrons are fundamental particles and leptons then what happens when they emit or absorb photons or Z particles? What is known about the mechanism of these aborptions or emissions for any particles? Do the absorbed electrons gain mass as particles are described to do as they move nearer to...

Hi. First off, sorry if this is the wrong forum; this seems to be the most valid one, but if that's not the case please let me know. Anyway, I am writing a thesis, and in it I mention the Michel electron (electron created from muon decay) and note that it gets its name from Louis Michel. I was...

Look, I found that there exist two kind of electric current: conventional flow and electron flow. I have read that in every situation I have to use the conventional flow, however I'm going to work with electric circuits using copper wires. In solids, only negatively charged particles (electrons)...

Hello.This is probably totally stupid question, but anyway... Is it possible to create bag made of particles with very strong positive charge and electrons using attracting force between them? If theoretically at least in some parallel universe yes, then if we keep shooting electrons inside...

Why? And how? Electrons has to move from one energy level to another?

hey! So oribital electrons can only absorb photons if they are the exact amount of energy between energy levels unless it is more than the ionisation energy. But why can't they? Couldn't they just emit the extra energy or 'keep' it? Thanks :smile:

As multiple stars would collapse into a black hole, are the electrons shot outwards? Or are they converted into mass with infinite density (what a black hole is right?) Thanks.

Hello! I've read that electrons can only absorb photons of exactly the right amount of energy to move to a higher energy level, if its to little or too much then it doesn't absorb it at all, so my question: How can electrons be liberated from an atom with Kinetic energy when they can't absorb...

I'm talking about the chemical shift. In XPS test, oxidation leads to the increase of binding energy. This is determined by: 1. attraction between nuclear and the electron 2. shielding effect from outer-shell electrons My question is : What does shielding effect mean? Shield what? The positive...

Hello all. I have been looking at this problem: I wrote three equations there, one for each part, which I think will help me solve each part; is my approach to the problem using those equations that you see there correct? I am just looking for some advice on where and how to start this problem...

For simplicity let's assume Gaussian shape. I just want to verify my understanding about wavepacket. As the thread title says, when we have a wavepacket, is it understood as the superposition of many plane waves corresponding to many free electrons, or as the wavefunction of only one electron...

1. Homework Statement Three electrons form an equilateral triangle 1.00nm on each side. A proton is at the center of the triangle. What is the potential energy of this group of charges? Known Variables: s = 1.00 × 10-9m p+ Charge = 1.60 × 10-19C e- Charge = -1.60 × 10-19C r = s/√(3) = 5.77 ×...

It's known that the number of states in a band is equal to the number of unit cells in crystal. Here is my problem (confusion with trivial concepts) Bloch function is a electronic state, or orbital. The number of orbitals in a band inside the first zone is equal to the number os units cells...

Say that two electrons travel in parallel at Ultra relativistic speeds, such that the observed energy-mass of said electrons (from a resting observer) is sufficient to generate a gravitational field great enough to overcome the repulsive coulomb force between the two electrons. This implies the...

It says in question "Express your answer using three significant figures." Now; I know 1e = 1,6*10^-19C -90μC=-9*10^-5C N=q/e so (-9*10^-5C)/(1,6*10^-19C) =-5,625E+14 or -5,625*10^14 but that's a computer program so i don't know what it really wants from me i don't know my answer is true or...

What type of gas would change the colour of an electron beam as the speed of the electrons increases?

I don't know much about particle physics, but out of curiosity I was wondering what would happen if a stream of electrons hit a conductor, say copper plating, an would it be detectible?

When reading about the quantum explanation of permanent magnets, I only read about electron spins. Sure, but are they behind that aggressive attractive force existing between opposite poles? Common sense tells me the only things that should attract each other in a metal are electrons and...

I read somewhere that electrons produce constant magnetic field when moving with constant velocity. But I think it is not true.I thought a reason for it Imagine that an electron is stationary and I am moving with a constant velocity. In my respect electron is moving, so, it should produce...

I am constructing a linear particle accelerator and have come into a problem, I need a materiel that when a electron hits it the electron breaks apart in smaller particles and the materiel breaks apart (on the subatomic level of course) as little as possible and make a little exes radiation as...

I'm trying to understand how a diode works and for this I've used(among other resources) the book written by Albert Malvino, Electronic Principles. Everywhere I read about this topic, it says that when the N-type and P-type semiconductors are joined together, the free electrons from the N-type...

Why do Electrons "want" 8 Electrons on the outter "shell"? What is so special about 8?

When an object has excess electrons and is charged where are they? Are some of the molecules of the object given an extra electron? Also when two neutrally charged objects are rubbed together why do they both become charged? I would think that the electrons would prefer to keep both objects neutral.

First of all, I want to apologize ahead for three things: 1) Opening another tread about this experiment, with probably the same title than other 800 threads: I took a little time to read the other threads with similar titles and didn’t found this doubt in none of them, and also didn’t seem...

So when my book explains energy of electrons it says that the further an electron is from the nucleus the higher the energy, which is why orbitals that are further away have higher energy levels. Then later in the chapter it explains that the greater the distance between two electrons, the lower...

What kind of beam can remove all the electrons of the target solid object and disrupt the intermolecular bonds disintegrating the object? Can gamma rays do it (enough energy to knock all electrons)?

If electrons repel then why are particles attracted to each other so why do particles attract and what is the ratio of the gravitational attraction to the electric repulsion of both an atom and an electron? Thanks!

How exactly do the electrons move from the capacitor to the rest of the circuit? Do they fly between the capacitors plates, or can they only travel where there is a wire connection? (I.e., if a small chunk of our circuit looks like this: A-------| |-------B can an electron start from A, go to...

Is it possible to perform am experiment like that of Stern-Gerlach but with electrons instead of silver atoms? Thank you. -- lightarrow

Hi Guys, I was wondering; if electronic charge is conserved by Kirchoff's Current Law, then does this mean that the total number of electrons traversing any given circuit at any time is constant?

Do the number of electrons flowing affect when we turn on the electric light

In a 2003 post about electrons and their behavior, which as a rule goes, tended not to get to a final solution, there was a quote by a poster: "There is no chemical bond between chlorine and sodium. That is to say it is only electrostatic attraction, an ionic bond as opposed to a covalent bond...

Suppose you measure the spin of an electron with a sensor oriented in the +z direction and find that the spin is up (aligned with the sensor). Now if you immediately measure the spin of the electon with a sensor oriented in the -z direction, you are guaranteed that it will be down (oppositely...

I have a piece of copper in static condition. Since copper is a conductor, within the copper there is no electric field. Strange comes when I bring this copper in contact with a piece of zinc: in a tiny interval of time, certain amount of electrons would flow from copper to zinc. I suspect that...