Electron Definition and 999 Threads

Homework Statement I'm taking a module in Solid State Electronics and in the first chapter we went through energy band diagrams, conduction band, valence band, fermi energy level, forbidden gap, etc. Now in the notes it starts to derive some formulae for electron and hole current densities Jn...

If we say electron behaves as wave, does this mean if we were able to see an electron, we would see it moving up and down?

I am wondering about the minimum possible uncertainty (standard deviation) in an electron's position (Δx). How precise can one know the electron's whereabouts without creating other sorts of particles and phenomenons. I know of the localization energy interpretation of the energy uncertainty...

Homework Statement An electron is shot towards an infinitely long wire with high current flowing througuh it. Please, look at my "sketch" in the attachment. How will its trajectory be affected? What curve will it be? 2. The attempt at a solution I thought about circular motion, but the fact...

Homework Statement In a potential box (##L = 1.00pm##) an electron moves at a relativistic speed, meaning it's momentum can't be expressed as ##P = \sqrt{2mE}##. a) Using the uncertainty principle, show that the speed is indeed relativistic b) Derive an expression for the allowed energy states...

Homework Statement I want to derive the following equation. It is the potential energy of an electron inside a nucleus assumed to be a uniformly charged sphere of R.Homework Equations V'(r) =( -Ze2/4∏ε0R)(3/2 - (1/2)(r/R)^2) The Attempt at a Solution I get E = Ze2r/(4∏ε0R3) But I am having...

I have read the description of electrons as standing waves based on an analogy with a string vibrating at its natural frequencies: thus the different quantum levels are akin to the tones or harmonics of the string, right? So far, so good, but then I have seen contradictory complementary views...

Homework Statement So my teacher set us half term homework and one of the questions was state the relative size of a proton a neutron and an electron Homework Equations Not sure about equations The Attempt at a Solution Im a bit confused because everyone in my class got Proton: 1 Neutron: 1...

According to quantum mechanics, an electron possesses orbital angular momentum. And we know that orbital angular momentum is possessed by revolving body. Does electron revolve around the nucleus? Please explain. I shall be very much thankful to you.

Ran into a question in my amateur research. Been waaay too long since college physics, and I've exhausted searches. This is the theoretical question: Assume a non-conducting, infinite plane charged to +10 kV. An electron leaves perpendicular to the surface with an energy of 10 keV. How far...

I am in the midst of a discussion with someone who feels very confident that an electron is always and forever a point particle and never a wave; any wave-like behavior that is observed must be attributed to a pilot wave that guides the path of the electron. I have sought to argue that this...

Homework Statement Write the electron configuration for Cd 2+. Homework EquationsThe Attempt at a Solution [Kr] 4d10 Whenever we remove electrons do we always remove it from the s orbital in that period. So for cadium ion we remove 5s2 correct? But let's say it's Mn 2+ would we remove the...

Homework Statement In a measurement of the electron charge by Millikan's method, a potential difference of 1.5 kV can be applied between horizontal parallel metal plates 12 mm apart. With the field switched off, a drop of oil of mass 10-14 kg is observed to fall with constant velocity 400 μm...

I've been reading up on electron diffraction for electron microscopy, and I have been trying to understand the proof for the wavelength of an electron in a tunneling electron microscope. The proof I have been trying to emulate begins as follows: It then says that I must account for...

I have been researching wave/particle duality, and I have trouble comprehending how electron microscopy actually exploits wave/particle duality to operate. From Wikipedia, " Wave–particle duality is exploited in electron microscopy, where the small wavelengths associated with the electron can...

We have this situation an electron comes flying in electric field between two capacitor plates. Let's say that voltage is 12V and distance between plates is 1m. Electric field E=U/d=12V/m. Plates are connected to the battery just initially. The battery is later disconnected. If electron comes...

Homework Statement , 2. Homework Equations , 3. The Attempt at a Solution : [/B] If an electron and photon have the same energy, the electron will have a shorter wavelength, and a larger momentum. The shorter wavelength makes it useful for electron microscopes, outperforming optical microscopes...

Hello, I am learning about electron spin resonance and I just want to see if my understanding is correct. From what I gathered, if you place a paramagnetic material in a magnetic field, the electron energy levels split, and when you then apply EM radiation (generally microwave frequency) that...

I am trying to calculate what we'd expect the uncertainty in energy would be for an electron in a hydrogen atom where it was confined to its usual radius (120 pm) versus if we confined it to the width of a proton (.88 fm) to try and make an argument about why the electron does not fall into the...

Does a superposed state of an electron exist over a larger amount of space than the state of an electron as a particle?

Hallow, if we say electron is a wave, do we mean it oscillates up and down as is moves through space? I am lost please.

What makes an electron to change the direction after passing through the slit?

Homework Statement Why is the EA of Neon endothermic even though it has a high Z eff? Basically, what makes a full valence shell so stable? The attempt at a solution I know it has to do with shielding, core e-, and valence e-. But I don't know how to word it.

A few quick questions I'd like cleared up:1) Alkali metals are said to have a really low threshold energy, enough for visible light to cause the photoelectric effect. Does this mean if I aim a flashlight (turned on) at a piece of sodium, I could ionise it? Simply flashing a light over a piece of...

A photon has a spin of 1, while an electron is 1/2. I've heard it said that the electron needs to spin 720 degrees to complete a full cycle. Is there any proof that the electron is spinning 720 degrees and not just spinning 360 degrees, but at a lower harmonic of the photon-- 1/2 the photon's...

Homework Statement The radial wavefunction for ##3d_{z^2}## orbital is $$R=N\sigma^2e^{-\frac{\sigma}{3}}(3\cos^2\theta-1)$$ $$\sigma=\frac{r}{a_0}$$ Find r and θ for which the probabiity of finding the electron is maximum Homework Equations None The Attempt at a Solution ##R^2## gives the...

Homework Statement . An atom at rest can undergo radioactive decay, ejecting an electron at a maximum speed of 0.5c. If the atom in a particle accelerator is observed to produce an electron traveling at 0.75c, at least how fast must the atom itself have been moving? Homework Equations u0 x...

This is a multiple choice question that, after one incorrect attempt, I got correct; however, I want to actually understand what the explanation means. I'm hoping someone here can help. Homework Statement Two electrons, each with mass m and charge q, are released from positions very far from...

My very amateur knowledge of the nature of matter is that particles like electrons are local disturbances in a universe-wide field, like the electron field and that a field is a set of values for some quantity, one for each position in space. What I'm wondering is: What is that quantity in the...

Consider two atoms of platinum, A and B, in a sample of platinum. Atom A lives deep within the sample, and atom B lives at the tip of a sharp protuberance at the surface. My understanding is that electrons in the sample will accumulate within a surface defect such as the tip of a sharp needle...

I am trying to express some physical constants in natural units of ##c=1## and ##\hbar=1##. Let's start with the electron mass. In SI units, the electron mass is ##0.511 \text{MeV}/c^{2}##. I understand that in natural units, the electron mass is simply ##0.511\ \text{MeV}##. Now, is the...

Hi, I am looking for the reasons for the generation of heat developed in a material due to electron bombardment. Searching in the internet gives me only the estimations of the heat developed, but not the physical reasons for the heat development. Appreciate if I am provided any insight into the...

Homework Statement An electron is released from rest in a weak electric field given by = -2.70 10-10 N/C [PLAIN]http://www.webassign.net/images/lowercase/jhatbold.svg. After the electron has traveled a vertical distance of 1.4µm, what is its speed? (Do not neglect the gravitational force on...

Hallo everyone, I have a question about X-Ray shielding in a scanning electron microscope and I hope you can help me! The topic is that when electrons hit the specimen, characteristic radiation up to 10keV is generated. This radiation is blocked/decelerated my the surrounding tower and chamber...

Homework Statement Hi everybody! I'm unsure how to tackle the following problem, hopefully some of you can give me some hints on how to do so. :) How big is the force acting on an anode by an electron current of strength ##I=0.3##A if the electrons are accelerated with a voltage ##U=300##V...

Homework Statement On which orbit of hydrogen atom an electron has the speed of 734 km/s? Homework Equations Bohr's second postulate: mvr=nh,m=9.109\cdot 10^{-31}kg,v=734 km/s,h=6.626\cdot 10^{-34} m^{2}kg/s The Attempt at a Solution By using the second Bohr's postulate, we get 6686.006\cdot...

I came across this and i was fascinated, i hopefully would like to attempt to build a recreation of this but i have no idra what they used to make the accelerator work on this size. Any help...

I am trying to make a connection between the two in terms of the electron configuration for an atom relative to the octet rule for Lewis Dot diagrams. Maybe I just don't understand what the electron configuration represents. Why is it that Lewis Dot diagrams utilize 8 valence electrons as a full...

I want to know what is the source of electron and proton get their charge ?

If the amplitude of gravitational waves, frequency of gravitational waves and the vector potential of magnetic field in surrounding of such waves are known then what would be the easiest way to calculate resultant acceleration of electrons? My above question is based on the various researches...

I have seen some sites say that it doesn't and other says the opposite. So let's see Source of the pic: Chemguide Lets look at the hydrogen (Oxidation) half cell. If we assume that it contributes x volts until the electron reachs the copper, then no matter how big is the distance the voltage...

How do delocalized electrons participated in organic reactions

When an electron moves from higher energy level to lower energy level the energy doesn't released. But actually it should release. What happened to the in released energy?

Homework Statement An electron that has a velocity with x component 2.1 × 106 m/s and y component 3.1 × 106 m/s moves through a uniform magnetic field with x component 0.035 T and y component -0.16 T. (a) Find the magnitude of the magnetic force on the electron. (b) Repeat your calculation for...

The pressure of the electrons of Copper are about 105atm. Why, then, don’t the electrons in a piece of copper simply explode out of the metal?

Homework Statement Silver has a Fermi energy of 5.48 eV. Calculate the electron contribution to the molar heat capacity at constant volume, Cv, of Silver at 300 K. Express your result as a multiple of R. Is the value of Cv due principally to the electrons? If not, to what is it due? ans...

My question is, Why do we use q=1.6*10^-19 C rather than -1.6*10^-19 C, for the charge on an electron in most of the equations?

Homework Statement An electron is launched at a 45∘ angle and a speed of Vo = 5.0×10^6 m/s from the positive plate of the parallel-plate capacitor towards the negative plate. The electron lands 4.0 cm away. Homework Equations F = ma = qE v = d/t s = vt -(1/2)at^2 x = 0.04 m The Attempt...

Let`s say you have a "magnetic field" (call it B) and let`s say it has a z direction, all over the space. Now let's kick an electron into the scene perpendicular to z. It will feel a force F=e v B to the axis z. Given a velocity v = v0 this won't change. We have an electron running in a circle...

I was wondering just what physical properties of an electron influence it's probability of being detected in a certain spin state? For example, if I prepare an electron in the spin up state along say the way y-axis (vertical axis) and pass it through a detector that is at 0 degrees, then using...