Electron Definition and 999 Threads

Good afternoon, I hope this is in the right place... Anyway, diving right in- Say I have a classic CRT- How do I calculate the energy, in eV, that the electrons have upon reaching the anode? Also, is there a way to derive the speed of the electrons as well? See the attached image to...

The water analogy can be used as a rudimentary tool to describe an electronic circuit, but in the case of voltage on a wire, it is exactly analogous. When a voltage on a wire is induced, the power supply or battery is shoving excess charge (which moves to the surface of the conductor) into the...

Homework Statement An electron moves to the right with a speed of 0.90c in the laboratory frame. A proton moves to the left with a speed of 0.77c relative to the electron. Using the Lorentz coordinate transformations, find the speed of the proton in the laboratory frame Homework Equations $$...

I was reading thermodynamics and about Born Haber cycle. There, I found that the values given for electron affinity are positive. When an electron is added to flourine, it attains noble gas configuration. So i t becomes more stable. So shouldn't the reaction be exothermic?

What happens if an atom's electronic configuration remains unstable? So we know atoms react with each other to share or transfer electrons, causing them to bond. It's in their nature to do so; if they do not, they'll remain unstable (apart from some Noble gases which are already stable). What is...

okay , this question might look a little silly .. But i have been wondering about this for a while .. i know electrons move around the orbit because of the electrostatic force between electron and proton .. But what what makes an electron rotate about its axis ? i believe even without the spin...

Does a Buckyball spin like an electron or like a baseball? We are often told that an electron does not really spin like a baseball. Only one (or two, if you count up and down) spin states, for example. How about a Buckyball? Does it spin more like an electron, or more like a baseball? Where...

What exactly is the relation between these 3 quantities? As far as I can tell the work function is the energy needed to bring an electron from the fermi level out into vacuum, while affinity is from the bottom of the conduction band. Does this then mean that they can be used to calculate the...

I have read that an ordinary muon capture happen with this equation below: μ + p -> n + vμ It looks the same as the electron capture e + p -> n + ve I don't understand why there isn't any additional energy in the system, although a muon has a greater mass. Also, why isn't there an additional...

Is there any energy difference b/w two electrons of the same orbital having anti parallel spin?

How electron gets its charge ? For that matter any other particle charge?

What is an electron made of? And don't reply that it is an elementary particle or a string.

When I use E=mc2 to calc. the rest energy of an electron, I get .512Mev not .511Mev. I am using 9.109x10-31 kg for the rest mass of an electron and 2.9979x10^8 m/s for the speed of light in a vacuum. Can anyone tell me why there ís a discrepancy between my results and the accepted answer?

Hello, 1. I read here and here that in the hydrogen atom, electrons move at approximately ~1/137c. In the first link they speak of "zipping around the nucleus", presumably figuratively, because it is often stressed that QM has superseded the earlier model of electrons flying around. Instead we...

I've been really into electrons and their orbitals for a few months now, but I've never understood how they come up with all of these 3d models from these complicated equations. I would love it if someone could explain in detail the equations and the values of the variables and constants within...

I read this book called How To Teach Relativity to Your Dog by Chad Orzel. In the book he discusses how an electron is known to have mass but is also considered a point like particle. He said that some interpretations consider the electron thus to have an infinitely dense mass which should...

Does the orbital of an electron change when it experiences a spin-orbit interaction, and if so, how?

If an electron moves at light speed, how do we know that it has a definite mass(9.1 x 10^-31kg)? According to relativity, shouldn't its mass be infinite?

I'm trying to reuse an electron gun from an old black & white TV for an art project. I've posted into this forum rather than Electrical Engineering as I think that this is a strictly mechanical matter with no electricity involved. The TV's dead, and all I want is the physical bits of the...

Is an electron anti neutrino and a positron neutrino the same thing?

In the stern-gerlach experiment, silver atoms with a +1/2 would be deflected up, and atoms with a -1/2 spin would be deflected down. With that in mind, would electrons' orbitals within an atom be affected by its spin?

In a solid, is electron's wavefunciton confined to a molecular orbital between atoms or is it delocalized and extends over the volume? According to valence bond theory, electrons are localized in bonds between atoms. But according to band theory (or Bloch wavefunctions), electrons are...

V Chernyak, Wei Min Zhang, S Mukamel, J Chem Phys Vol. 109, 9587 (can download here http://mukamel.ps.uci.edu/publications/pdfs/347.pdf ) Eq.(2.2), Eq. (B1) Eq.(B4)-(B6). When I substitue Eq.(B4)-(B6) into Eq.(2.2), I can not recover Eq.(B1). Who can give me a reference or hint on how to write...

How are these pictures taken of the electron wave function without the wave function collapsing? Does this mean that electron wave functions are real waves after all? Wikipedia Quantum cascade laser will give you the discription

Hello fellas! Ok, so we have the isotope Nickel-58 which can decay (still theoritically) to Iron-58 through double beta decay plus (bb+), my question is... imagine this decay is actually demonstrated (just figure it), so the transmutation into the iron isotope actually works... would the ejected...

What are some of the failed experiments to determine electron's position? One could be by electromagnetic radiation of suitable wavelength (here X rays) but that tears apart the atom. I want to know the different views tried to determine electron position.

This is one of those question you won't find the answer in any book. From Wikipedia: it is impossible for two electrons of a poly-electron atom to have the same values of the four quantum numbers (n, ℓ, mℓ and ms). But how can an electron know the state (the quantum numbers) of the other...

Is it possible that they have the structure something like we used to picture them as? For example, what if we captured an electron and zoom in with a microscope that see infinitly small distances. Is it possible that if we zoomed into the electron close enough that we would see an object...

I am confused about Ionization and electron affinity concept If energy is Required to add the electron to gaseous atom (Electron affinity - in case of noble gases) Then why further energy is required to Remove it? (Ionization energy) isnt this violation of Conservation of energy?

Looking at Ben Krasnow's youtube video on breaking down the parts and general cost for a scanning electron microscope, he lists a raster scan generator, is that able to produce the highest resolution images still? Or is there another more modern technology for this purpose? Otherwise, how has...

I understand that we need to supply energy to counter the nuclear attraction when we remove electrons and that is the reason ionization energy is endothermic. However, why does an atom release energy when we add an electron to it? And also why do some elements( like the halogens) release more...

In an atom of something like oxygen with a completed 2p orbital, do the paired electrons within the orbital behave differently than the same 2p orbital that is uncompleted? Bear with me and try to understand this question as I am a little fuzzy on the subject and I don't know how else to ask...

What's up people? I'm new in this wonderful forum. I have several questions about circuits, and they are not really common, I mean, I find them somehow complicated, but I would really come to enlightenment if you guys gave me some clues. 1.- So, let's suppose we got the simplest circuit, a...

Homework Statement I'm right now trying to solve a question concerning the direction of an electron in an electric field. There is the picture I added given and you know that there is a homogeneous electric field. The blue line represents the movement of an electron (there is no movements up...

Do the orbitals of electrons change positions within their energy level relative to the nucleus or are they statically "attached" to the nucleus? To try and put this into perspective, would the orbitals of the electrons be like nailing a balloon(orbital) straight to the ball(nucleus) or nailing...

Given that (a) the electrostatic force is inversely proportional to r2 (b) that the electron is (when it is determined) a point (c) that the repulsion for an electron to itself is therefore r=0 (d) that r=0 would naively end up with infinite force What is the way out of this problem? Thanks

If positive and negative charges attract each other, why don't electrons just stick to the protons?

If you rub two electrically neutral pieces of insulation together, one piece becomes charged and the other piece becomes oppositely charged. Does this transfer of electron depend merely on the electron affinities of the two pieces, or does the conductivity of the two insulations play a part? I...

thankyou to anyone reading this. I am starting honours in physics and have been given the opportunity to do a project that leads to a phd in the condensed matter theory. The guy I will be working with seems to specifically do work around the theory involved in electron microscopes. hes a great...

Hi! I have understood how elements such as Be and Ca, with fully filled 2s orbitals, are not to be considered "noble" because they still have unfilled p orbitals. But I'm having trouble understanding how these elements participate in chemical reactions without having any unpaired electrons. My...

we generally talk about electron current in metals.but when an electron leaves, it leaves a hole in its place. does the hole current really exist in metals?please explain the stuff.

So i have this simple situation where i have an electron beam with a certain kinetic energy, and i have a metal plate connected to the ground, and the electrons hit the plate, now i want to know the voltage of the current in the wire to the ground. Now i know both kinetic energy of the electrons...

Hi All, Does a beam of "low energy/small wavelength" gets refracted when passing from one media to another. Thanks

hi, I just looking for Video on diffraction pattern of Electron, and noticed it produces green color pattern. Earlier in chapter, when cathode ray was discovered, it was mentioned that Green glow was Noticed. What is the reason for this green color?

I'm looking at a program for Monte Carlo simulation of electron trajectory in a matter. When I look at the detected X-ray spectrum, there are two distinct curves, one called "characteristic", the shape of which is peaky. The other is called "background" where the shape is continuous. My...

Is it because the electron has less mass and is a point object that prevents it from falling into the nucleus due to attraction of protons?

This may be a naive question but this has been bothering me. I read that electrons having energy above 100 keV are considered as relativistic, on the other hand electron's rest mass is 511 keV. How can a free electron have energy less than its rest mass? What kind of energy implied in saying...

If you place an electron between oppositely charged parallel plates, is it true the the force on it is the same regardless of how far it is from each plate? If so how?

Homework Statement An electron with a speed of 1.1 × 107 m/s moves horizontally into a region where a constant vertical force of 3.2 × 10-16 N acts on it. The mass of the electron is 9.11 × 10-31 kg. Determine the vertical distance the electron is deflected during the time it has moved 34 mm...

Why is/are an electron/electrons a sphere/spheres ? Need the mathematical proof...