Hydrogen Definition and 1000 Threads

Hello all, I have been reading about the hydrogen problem at the Hanford Vitrification Plant site. Hydrogen and/or other flammable gasses are being generated in the double shell vessels. Excerpt below is from ...

Hi, I'm interested in solving the Hydrogen Molecule for a school project (computational physics course) WITH electron interactions included. I'm thinking of calculating the bond length using some kind of variational method, but I'd also like to calculate the energy levels of the two-electron...

Hi guys, a buddy of mine and I are high school students and we are attempting to create a lattice fusion reactor using deuterium heavy water. However, know that there are ways to detect oxygen, carbon, etc... but how would one detect hydrogen or helium? Thanks

This is not a homework question.

We know that hydrogen atom has got one electron.But If we look a hydrogen spectrum there are lots of spectral line. How can that be possible? Because in Bohr's atomic model the spectral lınes mean, electrons energy levels.It shows there is possible energy levels which electrons can...

Homework Statement Two hydrogen atoms, both initially in the ground state, undergo a head-on collision. If both atoms are to be excited to the n = 2 level in this collision, what is the minimum speed each atom can have before the collision? Answer in units of m/s 1 mol of hydrogen is...

Paulis exclusion principle say that two electrons around a nucleus can't have the same quantum number. Does that mean that, say, two hydrogen atoms with electrons with the same spin can't make hydrogen gas? Or does one of the electrons change its spin?

Why does H2Se have a bent shape? It has 6 valence electrons. 2 are used to bond with each of the hydrogens. 2 more up and 2 more down. So the repulsion of the lone pairs cancel off each other. Isn't this arrangement going to make the bond angle 180°?

Hello fellow scientists! I'm confronted to this conundrum: I've been asked to find which substance present in blood is the catalyser of H2O2: -MnO2 -KMnO4 -FeCl3 -Fe(NO3)3 I've thought about it for a long time. However, it is said that MnO2 is a catalyser of H2O2 online. Then, I have seen...

When solving the three dimensional Schrödinger equation, we obtain a probability distribution on θ. But it seems like the procudure produces a particular direction the z-axis. While the Coulomb field is spherical symmetric, it shouldn't exist such a preferred direction. I'm puzzled.

Hi I am trying to figure out if there is call for a small, commercial, educational radio telescope to measure the 21cm emission line of hydrogen. We have been developing an instrument with the following characteristics: - The antenna would have a size of about 1m x 1m. Because the...

What potential would one use when evaluating the Dirac equation of the hydrogen atom? Would it simply be in the form used when examining the hydrogen atom-Schrodinger equation or does it need modification?

What would happen if we placed a hydrogen molecule in a box with sides less than the Bohr diameter. That is, a box so small the electrons could not orbit around the protons at a distance of a Bohr radius. What state would the two electrons and two protons take?

I'm studying the Bohr's hydrogen atom and my teacher gave us a challenge question. When I was working in the problem I've got a couple of other questions that I don't know the answer. The initial problem was the following: Today we know the electrons are not the only particles moving inside...

Homework Statement In the Bohr-Rutherford model of hydrogen,the electron moves in a circular orbit about the proton. Homework Equations I = e/t = e*v/2*pi*r I = current , e = charge , v = velocity , r = radius The Attempt at a Solution 1)Calculated the electric current...

I'm trying to do a HW involving the Darwin Term in the fine structure of hydrogen. I'm given that the perturbation from the Darwin term is equal to (times a constant factor which I'll ignore), V_D = [p_i,[p_i, \frac{e^2}{r}]] = e^2\vec{p}^2\frac{1}{r} -2e^2\vec{p}\frac{1}{r}\vec{p} +...

In my chemistry lab we prepared the following solutions: Buffered Iodide Solution 25 mL acetic acid/sodium acetate buffer 6mL of 0.5 % starch solution 6 mL of 1.0M KI fill to the 250 mL mark with distilled water 0.025M Thiosulfate Solution 5 ml of 1 M Na2S2O3 fill to the 200 ml mark...

I don't know if you are familiar with it, but in pertubationt theory for hydrogen it is handy to look for eigenstates of J = L + S since this commutes with the hamiltonian (L and S are not separately conserved). My book then says that the good quantum numbers are: n,l, j, mj I must admit I'm...

I have a fairly straightforward question: how does one formulate the problem of hydrogen atom with quantum field theoretical treatment? I understand that one can just take Uehling potential and find approximately the bound states' energies and wave functions, but it would not make electron...

I am sure there must be a better way to do this, but I just used the method I thought would work. Essentially, I just want to find n and put that in p=nh2π, but my method to find n will give me a complex answer, which is clearly not what I am looking for. If someone could either tell me what...

Cryogenic liquid hydrogen tanks are common in industry. These tanks have an inner vessel and an outer vessel. Between the two, the space is sometimes filled with perlite and a vacuum pulled to reduce heat transfer to a minimum to prevent boiling of the liquid hydrogen. This is the same...

Homework Statement There is a half space z>0 full with hydrogen gas with density n atoms / metres cube. An incident wave plane with pulsation ω coming from z = -∞ arrives at the surface of incidence. This wave transports a flux of energy ∅0 at z=0. We consider a elementary cylinder whose axe...

Hello. I'm just wondering how many cubic feet of gaseous hydrogen are in one gallon of liquid hydrogen. I know I'm not being too specific and that many variables are involved (temperature, atmospheric pressure... etc), but approximately how many are in a gallon? And yes, I have checked...

Hey there PF, I'm trying to determine the reaction equation for a little home experiment I've been conducting. The setup is very minimal: copper metal in a solution of 3% H2O2 and 5% CH3COOH. In reality, I'm probably missing something fairly straightforward. The reaction occurs very...

I'm trying to understand electron orbitals. I'm a beginner. I'm looking at the shapes of p orbitals in a chemistry book, and it's talking about Hydrogen. I'm surprised to see that the orbitals are not spherically symmetric. How can that be when the nucleus is spherically symmetric? Can a...

Homework Statement A diatomic molecule, when excited, can vibrate in such a way that the relative distance between the two atoms, r(t), executes periodic oscillations. If the potential energy of the molecule as a function of r is given by V (r), the time dependence of r(t) is identical to...

Hi, Would a clump of gas in space have some diatomic molecules in it as well? If it does, how do we find the ratio? I know that hydrogen gas at room temperature on Earth is diatomic. So I guess the state of the gas molecules change like this. Diatomic molecules -> Monatomic ground state ->...

Hello all . Rest mass of Hydrogen is more than rest mass of one proton and one electron ? I mean virtual photon between electron and proton give extra mass to Hydrogen ? Like gluon between quarks ? and another example : mass of solar system is more than mass of One to One planets and sun...

I saw a video on youtube saying water molecules were held together by hydrogen bonding, not dipole dipole. Why is that?

I asked my chemistry professor this question, and he gave me a brief answer of "yes and no", and I never followed up to explain that. Hydrogen is in the same column as the alkali metals, and it does donate electrons. However, it is gaseous and found diatomically (making it similar to some...

Let's say there a particular hydrogen atom would be a rare-occuring hydrogen atom without a nuetron. And let's say it's a cation that donated it's electron. Would it essentially be just a wandering proton?

Hi, I am looking for electronic excitation levels of molecular hydrogen like attached table. but there are only a few electronic states, i need near-threshold energy levels. where can i find all levels? thanks for attention http://imgim.com/5648inciz1637947.jpg

Here is the abstract: http://pubs.acs.org/doi/abs/10.1021/nl304680w I would need to pay the $35 so I have not read the full text. Question: it says "...without Light, Heat, or Electricity." Where is the energy required to split the water molecules coming from? Jeff

Part 1----------------------------------------- Ok, the site I have just read through is http://burro.astr.cwru.edu/stu/stars_lifedeath.html one. I have a few questions about it. Firstly, about the fusion of helium into hydrogen... http://burro.astr.cwru.edu/stu/media/fusion.jpg It...

One molecule of diatomic hydrogen H2, passing through an electric arc between tungsten electrodes, splits into hydrogen atoms by absorbing a considerable amount of heat: H2 + 103Kcal = H + H = H2 + 103Kcal Atomic hydrogen, recombining into molecules, being unstable, after 0.5 seconds, gives a...

Hi, I am not a chemist but maybe there is somebody who can help me. I need a put together an emergency plan as part of a college law assignment on European Seveso directives. My case study has 17t of Hydrogen and 8t of Fluorine. Both of which combine satisfy the requirement for a lower...

Homework Statement Hi guys the question is "Write down the time independent Schrödinger equation for the hydrogen atom, and show that the wave function Ψ(r,θ ,φ ) = Ae(−r / aB) is a solution. (A is a normalization constant and aB is the Bohr radius.) What is the energy of the state with this...

I have always been wondering how in an active star the H/He fusion cycle is "managed" for lack of a better word, a little like a logistical analogy really. Specifically: i) Where in the star is the yet-to-be-fused H 'stored'? ii) Where in the star is the He result of fusion 'stored'...

When I write down the Hamiltonian for the hydrogen atom why do we not include a radiation term or a radiation reaction term? If I had an electron moving in a B field it seems like I would need to have these terms included.

Hi all, one last question for today - Given steam reforming of natural gas to generate hydrogen, what is the major difficulty with it with respect to most fuel cells? Thank you,

Homework Statement Ultraviolet light with a wavelength of 45.0nm shines on a gas of hydrogen atoms in their ground states. Some of the atoms are ionized by the light. What is the kinetic energy of the electrons that are freed in this process? I found the kinetic energy right but for some reason...

A hydrogen atom is in its ground state and is subject to an external electric field of E = ε(\hat{x}+\hat{y}+2\hat{z})e-t/\tau I'm confused as to how to compute the matrix elements of the perturbed hamiltonian since this is not in the z direction. Would I have to do something like this...

Homework Statement What are the orbital angular momentum possible values for an electron in a hydrogen atom with a principal quantum number n = 3? Homework Equations L = \sqrt{l(l+1)}\hbar The Attempt at a Solution Possible values for l are 0, 1, 2. So, substituting these in...

Hi everyone Homework Statement What's the probability density of an electron at a distance r (from hydrogen) which is in the stae n=2, l=1. Homework Equations - The Attempt at a Solution I think I have to to solve \int |\Psi_{nml}|^2 dV The solution of the Schrödinger...

Homework Statement What wavelengths emitted from a hydrogen gas discharge tube are associated with transitions from higher levels down to the n = 1 level? [a] infrared [b] visible [c] mixture of infrared and visible [d] ultraviolet Homework Equations Equations: 1/λ =...

Homework Statement The annual world use of liquid hydrocarbon fuels for transportation purposes currently generates about 10^17 kJ. If we could instead run our transportation system by oxidizing hydrogen gas to gaseous water, we would likely have to obtain the hydrogen by electrolyzing water...

Homework Statement Hi everyone! first post here :) Basically, the question is as follows: Consider a hydrogen fluoride molecule (atomic mass of H is 1g/mole and of F is 19 g/mole). 1. Write the energy of the system in terms of the displacements of both atoms. There are other questions...

Hey, How do you know how many hydrogen bonds ethanol molecules will form with each other? I know there are 3 sites where H bonds could form (2 lone pairs on oxygen and the hydrogen) but with something like hydrogen fluoride, each molecule only forms 1 H bond on average so shouldn't something...

I probably knew the textbook answer to this at one time, but I don't recall. Feynman states in the beginning of Vol II of the FLP that electrons don't collide into the nucleus due to the uncertainty principle. But an electron positron pair will mutually annihilate. I suspect the answer has...

Homework Statement Whenever a photon is emitted by hydrogen atom in the Balmer series, it is followed by a photon in Lyman series . What wavelength does this latter photon correspond to ? Homework Equations Balmer series corresponds to the wavelengths in the visible spectrum and Lyman...