Hydrogen Definition and 1000 Threads

I can't figure out why hydrogen is more likely to bond to either the nitrogen or to the sulphur atom. I can't locate any information in any textbooks or online as to which molecule is more prevalent/common. This is not a homework question. I just came across one of these molecules and wondered...

Why energy of the electron in ground state of hydrogen atom is negative ##E_1=-13,6 \rm{eV}##? I am confused because energy is sum of kinetic and potential energy. Kinetic energy is always positive. How do you know that potential energy is negative in this problem?

This above is the diagram I'm not too sure about the solution to this problem as to why I came here. Is it something to do with photons having different frequencies i.e emitting different amounts of energy based on its frequency

Hello All: Read an article about new trend in fusion science about hydrogen-boron 11 fusion Called HB-11 fusion and a start up are doing a research on it using pulsed laser What I don't understand how it is considered a possible new method for energy production when we know hydrogen and...

I was asked in a test this question: Electron in hydrogen falls from level 4 , how many lines we will see on the ejection spectrum? I hope I translated it well. I see a lot of question about those lines but can’t find information about it. Can anyone explain it to me?

A trial has commenced at Keele University in the UK where 20% Hydrogen is injected into the domestic gas supply. In this way it can be stored and then utilised by existing domestic burners. Can this be a quick solution to reducing domestic CO2 emissions? Or is it better to use battery storage...

I'm interested in doing more detailed photos of the Sun using my solar filter and a 1.25" Hydrogen Alpha (Ha) filter. Is this possible to do or is it best to purchase a Coronado telescope?

I am attempting to find information about the permeation of hydrogen through carbon fiber reinforced carbon composites and was wondering if anyone could provide some help. I don't have many details to provide. We are in the early stages of a research project in which hydrogen may be flowing...

hi guys i am having a little problem concerning the theta part of TISE : its clearly that its very similer to the associated Legendre function : how iam going to change 1/sinθ ... to (1-x^2) in which x = cosθ i tried many identities but i am stuck here . any help on that ?

I'm considering a hydrogen atom placed in an infinite potential on one side of the nucleus, i.e. ##V(x) = +\infty## for ##x < 0##. I require the wavefunctions to be odd in order to satisfy the boundry condition at ##x=0##. By parity of the spherical harmonics only states with ##l## odd are...

Homework Statement:: The total energy of the electron in a hydrogen atom is normally −13.6 eV. Which one statement below, based on this fact, is correct? 1. The work required to completely remove the electron from the atom is 13.6 eV. 2. The electron is in a circular orbit with a kinetic energy...

Is it possible to find a hydrogen atom which atomic nucleus is on Earth and electron is on moon?

I've first method I tried was using f = v/λ to find the frequency, then E = hf to find the energy and then using E = (-13.6eV/n^2) - (-13.6eV/n^2) to rearrange and solve for the unknown n. However I got 5, the same as the original entry level. I also tried using 1/λ = R(1/4 - 1/n^2) to solve...

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Is it possible to have a configuration of two classical positive charges and two classical negative charges that will remain fairly stable (or at least metastable), if started off in some well-chosen initial condition? For example, we might want to eliminate radiation by having the electrons...

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This recent article (https://www.quantamagazine.org/physicists-finally-nail-the-protons-size-and-hope-dies-20190911/) on the size of the proton left me with a couple of confusing questions: 1/ Is the amount of the lamb shift completely determined by Feynman diagrams or is "it spends part of its...

in the book Molecular Physics of Wolfgang Demtroder, he claims for hydrogen ion molecule ##H_2 ^+## the total angular momentum in absolute value is a constant quantum number. I never saw it any other book and I think it's wrong, because there is no reason for it and he doesn't prove it. here is...

I’m not sure if this belongs in classic or quantum physics... but here it is...Is it possible to calculate the “voltage” between an electron and a proton in a ground state hydrogen atom?I know the ionization energy is 13.6 eV, so I assume it's safe to say the voltage is 13.6 volts at a certain...

Here's how I approached it. We know the total mass of the cloud, it is given. Let's call it 'M'. We can also find out the mass of a single hydrogen atom from its atomic weight. Let's call this 'm'. Then N = M / m is the total number of hydrogen atoms in the cloud. The temperature (T) is given...

Good day, I am here because I have begun a new hobby and it is my hope to better understand what it is I am doing and seeing. Luckily I have the mental capacity to process much of what I read, but sadly I am vastly under-educated. My new project involves electrolysis and for reasons I don't...

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I have never posted a Q here before, but as an old knife and swordmaker, when I saw this article: https://phys.org/news/2019-06-french-scientists-metallic-hydrogen.html It suddenly piqued my interest: IFF one can create a large enough, meta-stable crystal of metallic Hydrogen, and were able to...

If you remove (seperate) all 8 hygrogens of atypical polymer Styrene. Does is make both inert Carbon and inert Hydrogen? Thank you! John

I understand hydrogen peroxide has bacteriostatic and fungacidal properties at a concentration of 0.88 mol/l however I am struggling to establish how much something like vanish containing 30% sodium percarbonate (30g per 100g of product?), would be needed to provide that concentration and...

Hello, I have a little problem understanding the quantum mechanics of a hydrogen atom. Im troubled with the following question: before i measure the state of a (simplified: without fine-, hyperfinestructure) hydrogen atom, which is the right probability density of finding the electron? is it...

Hello all; I am looking for an equation for calculating mass storage of Hydrogen in compressed vessels I have fount the following link (https://nanosun.co.uk/hydrogen-tools) which provides what i need but would like to create something similar for internal use Can you suggest an approach to...

Negative Hydrogen Ions in Cyclotrons and elsewhere I was vaguely aware that negative hydrogen ions are used in some cyclotrons and this improves beam current. I've been thinking about this recently after noting that hydrogen is actually quite electronegative in comparison to most metals (just...

Hi all My mainly question is about why we won't be able to detect Hydrogen as Ex. gas using IR technology sensors? Also, I'd like to know if H2 would be detected using IR senosor? I need to know what is the equivalent technology for this purpose too? Thanks Ay ElEbshihy

https://hunterschools.myschoolapp.com/ftpimages/602/download/download_2996847.pdfQuestions Why must the bottom of the thistle tube extend below the surface of the liquid in the Erlenmeyer flask? Attempt: The bottom of the thistle tube must extend below the surface of the liquid in order to...

I'm not sure where this post belongs--here, or nuclear chemistry, quantum mechanics, NMR spectroscopy, etc. Moderator--please feel free to move it to a better location. I'm wondering if a container of liquid hydrogen subjected to a strong magnetic field would have both nuclei of each atom...

Homework Statement Homework Equations VD= -1/(8m2c2) [pi,[pi,Vc(r)]] VC(r) = -Ze2/r Energy shift Δ = <nlm|VD|nlm> The Attempt at a Solution I can't figure out how to evaluate the expectation values that result from the Δ equation. When I do out the commutator, I get p2V-2pVp+Vp2. This...

Hi, I'm reading chapter 6-3 of Lamarsh's book "Introduction to Nuclear Reactor Theory". Here it is discussed the very idealistic case of Hydrogen being used as a Moderator (without adsorption). The moderator is: - infinte - homogeneous - with uniformly distributed source emitting at constant...

Did hydrogen reach some maximum level in the early universe before fusion began creation of helium and thus decreasing the amount of hydrogen, or do fission reactions maintain some kind of balance? If the universe is constantly expanding, the density of remaining hydrogen would seem to decrease...

Homework Statement Show that when a neutron is scattered from hydrogen, the angle between the laboratory velocities of the scattered neutron and the recoiling proton is always 90°. Homework Equations Conservation of momentum (Conservation of Energy) The Attempt at a Solution This isn't a...

Homework Statement What is the total energy of the hydrogen atom at ground state? a. 13.6 eV b. mpc2 + mnc2 c. mpc2 + mnc2 - 13.6 eV d. mpc2 + mnc2 + 13.6 eV Homework Equations E =...

Fuel cells quickly provide electricity from H2 when switched on. But what exact steps get to Grid voltage? Are there many small inverters, and if so, how do they keep the output in step? What sort of efficiencies are there?

Protium atom has two low lying excited states with long lifetimes. These are: 2s. Decay energy would be 121 nm, but forbidden (no angular momentum difference). Fastest allowed decay is two-photon emission, lifetime 0,15 s Triplet 1s. Decay energy 211 mm. Prevalent decay single photon emission...

if the human skin consists of hydrogen, then why does not happen hydrogen bond through contact with something or with another person?

Hi, Does a T-D or a D-D fusion release more energy? Even if D-D needs higher temperatures, would it produce more energy in a fusion reactor?

Hi, I'm having trouble understanding angular moment of the one electron hydrogen atom. Solving Schrodinger equation on a referece system (say S) I get the energy eigenstates. They depend on three quantum numbers, n, l, m \frac{-ħ}{2 m}\nabla^{2} \Psi - \frac{e^{2}}{4 \pi \epsilon r} \Psi =...

Homework Statement Determined wave function in a hydrogen atom. ## Ψ(r,θ,Φ) = A(x+iy)e^{ \frac{-r}{2a_0}}## << find A by normalization Answer of a question in my book is ## A = -\frac{1}{a_0 \sqrt{8 \pi}} (\frac{1}{2a_0})^{3/2} ## Homework Equations ## \int Ψ^*(r,θ,Φ)Ψ(r,θ,Φ) d^3r = \int \int...

Homework Statement Compare Dipole moment of CH3F and and CD3F where D is deuterium. Homework Equations Theory questions The Attempt at a Solution Our sir had explained that to do this question we muat take into account the vibration of the atom in the respective molecule. That is that the...

Homework Statement How should I calculate the expectation value of momentum of an electron in the ground state in hydrogen atom. Homework Equations The Attempt at a Solution I am trying to apply the p operator i.e. ##-ihd/dx## over ##\psi##. and integrating it from 0 to infinity. The answer I...

I want also to build electrolysis based hydrogen generator or and water oxygenator/aerator. It's simple electrolysis device but requires special electrodes that are corrosion resistant or at least safe for human consumption. I seen that hydrogen bottles use platinum titanium electrodes. Platinum...

If the spectral line of Hydrogen contains four colors, I don’t understand how the electron can jump four times to four different energy levels in the same moment?

Why is it that in Grotrian diagram only the 4p->3s is not allowed, but the 4s->3p, 4p-> 3d and 4d-> 3p are allowed ? I'm following the rules of Δl=±1 and Δm=0,±1 and they give the same numbers. I also tried with Δj=0,±1 and still the same. Grotrian Diagram for Hydrogen for n=[1,4]...

Sargasso seaweed is bulldozed into heaps 100 feet back from beaches, but still emitting stench after years of weathering. I would like to neutralize asap after removal from waters edge. H2S rendering adjacent residences uninhabitable.

Hello, suppose we have an excited hydrogen atom in 3p state which makes a transition to 2s state. Then the atom loses some energy by emitting a photon which can be detected (or seen). I have no problems with that situation. If there is an external magnetic field, the energy levels of the...

Homework Statement Explain the following order of the boiling point (° C) HF (19.5)> HCl (-85.1) <HBr (-66.8) <HI (-35.4) b) Explain the following order of connection distance (pm): HF (92) <HCl (127) <HBr (141) <HI (161) Homework Equations xxx The Attempt at a Solution a) HF does hydrogen...