Hydrogen Definition and 1000 Threads

  1. S

    Negative oxygen ions reaction with hydrogen

    Under what conditions and how will negative oxygen ions react with hydrogen and hydrocarbons (such as methane or gasoline)?Does it require some catalyst or should be burned together? What is a way to harness spare electrons from oxygen when water is formed?
  2. C

    Time-averaged potential of hydrogen

    Homework Statement The time-averaged potential of a neutral hydrogen atom is given by V = \frac{q}{4 \pi \epsilon_0} \frac{e^{-\alpha r}}{r} \left ( 1 + \frac{\alpha r}{2} \right ) [tex]\alpha = 2/a_0[/itex], where a_0 is the Bohr radius. Find the charge distribution (continuous and...
  3. T

    Genius | Calculating Hydrogen Needs for a Constantly Flying Blimp

    Hi. How much hydrogen dose it take to keep a blimp in flight. Let’s say I want 2000 kg of lift, and to keep it flying constantly. How much hydrogen would I need per day or hour? If I had a steel cable with a reinforced tube to keep hydrogen pumping into the blimp from the ground, what amounts...
  4. K

    General calculation of the oscillation freq of a hydrogen molecule

    Homework Statement Okay here's the problem, normally I can get all this stuff, but right now this is blowing my mind, partly because its too general. "In other problems and examples in the textbook we found the effective spring stiffness corresponding to the interatomic force for aluminum...
  5. K

    Sodium Percarbonate as I want to use it as Hydrogen Peroxide

    Hi chaps I wonder if anyone can help - I'm really stuck! I have purchased Sodium Percarbonate as I want to use it as Hydrogen Peroxide. I want to use it at 6% strength but do not know what ratio to mix it with water with! The data sheet is here...
  6. N

    About mixed integral for perturbation in hydrogen atom

    Homework Statement During my calculation of hydrogen atom perturbation, I need to integral below in cartesian coordinate. It is given that below integral can be transformed. Homework Equations Anyone could help to see what will the transformed integral in polar coordinate if the...
  7. M

    What the heck is ionized hydrogen?

    My professor just attempted to explain ionized hydrogen to us. She said that an ionized hydrogen atom is basically a proton. But I don't understand why that would still be considered hydrogen if it no longer has an electron.
  8. L

    Potential/Kinetic/Total Energy of hydrogen atom absorbing photon

    Homework Statement A hydrogen atom in the n = 2 state absorbs a photon with wavelength 380 nm. Q1. Find the change in the atom’s total energy. Q2. Find the change in the atom’s potential energy Q3. Find the change in the orbiting electron’s kinetic energy. Homework Equations...
  9. W

    What is the Probability of Finding an Electron in a Specific Angle in Hydrogen?

    Homework Statement Calculate the probability of finding the electron in a hydrogen within the angle \pm30\circ from the x-y plane.The hydrogen is in the (2,1,1) state. Homework Equations probability = \int\int\int\left|R_{2,1,1}\right|^{2} \left|Y^{1}_{1}\right|^{2} r^{2} sin(\theta) dr...
  10. A

    Angular momentum of hydrogen atom in specific energy level

    Homework Statement A hydrogen atom is in a state with energy -0.278 eV. Homework Equations L = nh' The Attempt at a Solution The answer book says to do E_n = (-13.6 eV)/n^2 but I can't find this equation in our book. Is the 13.6 a significant number or just a different number...
  11. C

    How many hydrogen atoms are there in a 5 sample of pure hydrogen?

    How many hydrogen atoms are there in a 5 sample of pure hydrogen?
  12. R

    Hydrogen atom, muon substitution, helium muon fusion

    Homework Statement Substitute an electron in a neutral hydrogen atom with a muon. a) calculate the Bohr radius of the ground state for this myonic atom of atom. The answer must be right to at least 2 significant digits. b) Calculate the fraction of the myon that is located inside the proton...
  13. X

    Hydrogen vs Atomic: Nuclear Fission vs Fusion Explained | Damage Comparison

    Homework Statement What is the difference between nuclear fission and nuclear fusion? After answering the question proceed on to answer the next question Between Hydrogen Bomb and Atomic Bomb, which bomb causes more damage. provide you answer with reasons. Homework Equations Nuclear...
  14. C

    Expected r^2 for the 2s wavefunction of hydrogen atom

    Homework Statement Calculate the expected value for r^2 for the 2s wavefunction of the hydrogen atom (only the radial part of the function is needed for l=0). If you choose to solve this problem graphically, plot or sketch the function you integrate. Homework Equations...
  15. V

    The Double Helix - Hydrogen bonding and stability

    Rank the following base pairs according to their stability. Rank from most to least stable. To rank items as equivalent, overlap them. ------------- I have found out that the first one is thymine-adenine pair and the second one is a cytosine-guanine pair. The third one is cytosine...
  16. M

    Is it possible to separate the 3 elements in cloth Carbon,oxygen and Hydrogen

    is it possible to separate the 3 elements in cloth Carbon,oxygen and Hydrogen without wetting it? Gas? Sound waves? Making the elements heavier?
  17. S

    Can Intercalation of Hydrogen Ions Solve the Problem of Hydrogen Storage?

    There exist such interesting issue as intercalation, which seems to allow, for example, to store 4.4 intercalated Li ions per one (!) Silicon atom.The latest is a host material.I think if there will be found a material which would allow to store the same ratio of intercalated hydrogen ions...
  18. S

    Does a hydrogen-oxygen mixture require ignition to react?

    Does mixture of hydrogen and oxygen actually has to be ignited or the reaction occurs even without ignition when some critical H:O proportion is reached?
  19. B

    Why do hydrogen and atom bombs have such force?

    Does it have to do with the strong nuclear force holding the atoms together being released?
  20. O

    Why is hydrogen the most common element in the universe?

    i understand that everything else is less as they are (in turn) made from hydrogen, but why was so much of hydrogen made in the big bang? i got a feeling because one proton and one electron is stable. (similarly, helium was produced as 2 nucleons + 2 electrons is also very stable) but I've...
  21. H

    Renewable hydrogen electrolysis system, advice needed

    Hello I'm currently in the middle of a dissertation project, a feasibility study of a tidal/hydrogen generation system. At the moment I'm getting pretty bogged down trying to model the electrolyser. I'd like it to be more detailed than simply power in*conversion efficiencies. In particular...
  22. Z

    How much pressure can be created by the decomposition of Hydrogen peroxide?

    We are a simple robotics group working in Antarctica. We have a small but nimble ROV that we launch through a hole we drill in the ice. We need to lift heavy objects off the sea floor. I want to use the decomposition of H2O2 to initiate a state change that creates the buoyancy to lift these...
  23. Z

    What is the meaning of the electron energy states in a hydrogen atom?

    You see hydrogen electron energy states labeled as 1s1/2, 2s1/2, 2p1/2 and 2p3/2. My confussion may be with understanding the definitions, but does not the 2s1/2 state imply that there are 2 electrons around as the 1st s orbital is filled. But, by definition doesn't that mean you are dealing...
  24. C

    Do photons cause electrons to accelerate in an atomic orbital?

    lets say i have a hydrogen atom and i shoot a photon at it but the photon does not have enough energy to kick the electron to the next energy level , does the electron absorb the photon and if it does what happens ?
  25. J

    Detecting hydrogen gas via IR spectroscopy

    Say I want to monitor the interface of an electrochemical cell via IR spectroscopy. If H2 gas is generated, there must be a characteristic IR signature to this event. How can I figure out what this is? Are there calculations for this? I'm sure this is in the literature somewhere, but I...
  26. E

    The stability of the hydrogen atom

    Hi there! If I want to find the eigenstates of the hydrogen atom in QM I start with the hamiltonian of a free particle in a Coulomb potential. But an electron in a coulomb potential is stable in classical mechanics too! The instability of the system comes from the fact that the electron...
  27. M

    Hydrogen Spectroscopy: 2S-2P Lamb Shift Transition Frequency

    I'm looking for the more precise value for the 2S-2P lamb shift transition frequency. I found the value 1 057 844.0(2.4) kHz in the National Institute of Standards and Technology website: http://physics.nist.gov/PhysRefData/HDEL/transfreq.html. Can someone tell me if there is a better value...
  28. A

    About The Bohr Model of the Hydrogen Atom

    Homework Statement What energy (in eV) is required to remove the remaining electron from a singly ionized helium atom, He+ (Z = 2)? (a) 3.40 eV (c) 27.2 eV (e) 76.9 eV (b) 13.6 eV (d) 54.4 eV Homework Equations Ei - Ef = hf The Attempt at a Solution Ef: the 1st level Ei...
  29. P

    Please confirm Hydrogen atom question

    Homework Statement Diagram not to scale: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Energy (J) n = 3 ----------------------------------------… - 0.24x10^-16 n = 2 ----------------------------------------… - 0.54x10^-18 n = 1...
  30. Q

    Electricity generation using hydrogen

    In fuel cells hydrogen combines with oxygen (due to a catalyst) resulting in a potential difference. Is it not possible to burn the hydrogen and use the energy from this exothermic reaction to produce electricity? Since the rate of reaction of hydrogen combustion is quite high we could keep the...
  31. S

    Generate Hydrogen Gas for Tethered Balloon - Cheap & Portable Solutions

    Hi All, I am currently designing a tethered balloon. The balloon is 36m3 and I was hoping to fill with hydrogen. The balloon will only be fully inflated at 400ft as I am aware of the risk of a hydrogen explosion. Unfortunately I live in Australia and 36m3 of hydrogen is USD$1800! I am...
  32. O

    Understanding Hydrogen 2p Doublet: Removing Orbital-Spin Degeneracy

    I am trying to better understand this concept. for an n=2 state, l=1 we have three values for the magnetic quantum number, -1,0,1. Now in the absence of an "external" field we still have the orbital magnetic moment.So we can say that the magnetic field that the electron craete by its orbit...
  33. T

    Photoelectric Effect of hydrogen atom

    1. The problem statement A hydrogen atom has an electron in the fundamental state. a. Show that a radiation with λ = 50 nm will ionize the atom. b. What will be the excess kinetic energy of the electron in joules? What is this question asking? Is it asking what wavelength will free...
  34. N

    Can I Pursue a Career in Hydrogen Fuel Cells?

    Hi all, I recently made my own hydrogen fuel cell and really enjoyed the process and everything I learned. I didn't know much about electronics or cells, so it was a great learning experience. In my research I found that chemical engineers made a nanometal to work as a catalyst instead of the...
  35. M

    Hydrogen peroxide as an oxidising agent

    Hi I recently did a reaction (see my last post for specifics) where hydrogen peroxide acted as an oxidising agent under basic conditions to oxidise Mn2+ ions in solution to MnO2 It did look as if some gas was liberated but hydogen peroxide only liberates oxygen when it is reduced...
  36. D

    Ground state hydrogen parallel to the double slit experiment?

    In the double slit experiment the electron can go through either slit. As long as it is not observed there is an interference pattern as the two possibilities superimpose. The common conclusion to this is that the electron goes through both slits. Is there a parallel with the ground state...
  37. B

    Hydrogen Spectral Series Question

    I do not understand the distinction between the Lyman, Balmer, Pascher series etc. I understand that you calculate the values in each series with the corresponding n' values but I don't understand the need for multiple series. Why can't you have one overarching series that covers the entire...
  38. B

    How did the Hydrogen Atoms formed from Energy ?

    Hi all,well my first questions, such a huge community, thanks to the admin/staffs for this making this forum :) How did the Hydrogen Atoms formed from the energy in the early universe ? like our DNA determines how we are built (just a sample approach), was there in the energy any...
  39. M

    Reaction of Manganese and hydrogen peroxide

    Hi In a recent lab I reacted Mn2+ ions with NaOH. The Mn 2+ ions exist in this equilibria [Mn(H20)6]2+ + H20 <=> [Mn(H20)5OH]+ + H30+ Addition of NaOH ions shift this equilibria to the left (by removing protons) until Mn(OH)2 is precipitated Hydrogen peroxide is then added and some...
  40. C

    Hydrogen Spectrum: Blue Line w/ 434nm Wavelength

    Homework Statement The hydrogen spectrum contains a blue line with a wavelength of 434nm. Photons of blue light are emitted when hydrogen's electron drops from the fifth energy level to a lower energy level. What is the lower energy level? Homework Equations 1/wavelength = R [ 1/n2^2 -...
  41. K

    Finding wavelength of hydrogen atom when changing energy states

    Homework Statement Find the wavelength of the radiation emitted when a hydrogen atom makes a transition from the n = 6 to the n = 3 state. Give answer in µm. Homework Equations z^2 / n^2 x 13.6ev delta E = E2 - E1 = hv The Attempt at a...
  42. W

    How to Find Eigenfunctions of Lx for a Hydrogen Atom in a Specific State?

    The system is at the state of Φ=aY_11+bY_20 (a^2+b^2=1),please find the possible eigenfunctions of Lx and the relevant possibilities? My solution: I have attempted to use the matrix mechanics to work out the exercise,but I should work out a 8-order matrix. Firstly I use the Fmn=〈m︳F|n〉to...
  43. H

    What is the most probable distance for a 1s electron in a hydrogen atom?

    1. The most probable point a 1s electron will be found in the hydrogen atom is r = 0. 2. The most probable distance that a 1s electron will be found in the hydrogen atom is r = 0. 3. For a hydrogen atom with l (lower case L) = 0, Ψ is independent of the angles Θ and Φ. 4. For a hydrogen atom...
  44. C

    Average Potential Energy of a hydrogen 1s electron

    I can't find any reference to this in my notes. The problem is to calculate the average potential energy of a hydrogen 1s electron. The operator is V=e2 /4piE0r
  45. C

    Controlling Electron Orbitals: The Key to Creating a Hydrogen Atom?

    how do i make a hydrogen atom , if i shoot an electron by a proton will it start to orbit the proton , what dictates whether it will orbit or not .
  46. V

    Hydrogen Atom and an Infinte Square Well

    Homework Statement Comparing the hydrogen atom orbitals to an infinite square well. a.) For the hydrogen atom, what is the energy difference between the ground state and the next energy level? b.) Now 'tune' an infinite square well holding a single electron so that it has the same energy...
  47. I

    Thinking about electronic collisions with hydrogen.

    This seems like such a simple question and I feel like an idiot asking it, but here goes: If we have a hydrogen atom (not molecule) at "rest" and we shoot an electron at it with a certain known energy, what could happen? To me, it seems as though there are two distinct outcomes; either the...
  48. S

    Calculating Expectation Value of Angular Momentum Squared for Hydrogen Atom

    Homework Statement Consider a hydrogen atom whose wave function at time t=0 is the following superposition of normalised energy eigenfunctions: Ψ(r,t=0)=1/3 [2ϕ100(r) -2ϕ321(r) -ϕ430(r) ] What is the expectation value of the angular momentum squared? Homework Equations I know...
  49. C

    Relativistic Mechanics of Hydrogen Like S Orbials at high Z

    In the middle of studying for my matrix mechanics/atomic orbial/diatomic bonding final and something has been itching at my buttcrack for a while. Above Z=20 or so the lower orbitals (that don't actually exist so I've come to find out) have to be calculated with relativistic QM because the...
  50. T

    How is Energy Released from Breaking Bonds in Liquid Hydrogen?

    When working with liquid hydrogen or LH2 as a fuel how can you determine how much energy will be released when you break the bond. And an off topic question here can you determine how much force that energy that will produce.
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