Hydrogen Definition and 1000 Threads

Just look at the first point.It says the given compound has four types of hydrogen atom.How?I can only see three types of hydrogen atom primary,secondary and tertiary which is the fourth type?Please give me a hint.

My notes states that fluorine is too highly electronegative and hence clings on too tightly to its lone pair of electrons and so it cannot accept hydrogen bonds as well. However, it also stated that a hydrogen bond will be stronger if the electron density on the electron rich atom the stronger...

Effect of intermolecular hydrogen bonding is as follows I don't understand one point i.e how occurrence of liquid state is associated with intermolecular hydrogen bonding as intermolecular hydrogen bonding helps in closed packing of molecules it should give rise to solid state.

What happens if a hydrogen molecule is stripped of an electron? Will it become 2H+ or will it become H and H+?

Homework Statement there is an expandable container with 1m3 of hydrogen and 1/2 m3of oxygen at stp. the gas is ignited.what is th final volume if there is no heàt lost and the pressure outside the container is 1atm? assume complete combustion Homework Equations other than the ideal gas...

Has this been accurately measured yet? Google searches yield results for H 1s-2s and H 1s-3s transitions but not 1s-4s.

I know that you can measure redshift from stars by looking at the shift in there balmer lines or more generally there line absorption spectra and seeing how far these lines have shifted from actual balmer lines or line absorption spectra of the same elements on earth. But how would you...

if I have vacuum chamber from steel then filled with hydrogen gas and cook it like cooking soup will the hydrogen ionized and become plasma? can heat like that ionize hydrogen gas? thanks..

Hello, I had a few questions regarding hydrogen. I know for a fact that hydrogen has a high value of specific heat. My questions are: 1). Isn't hydrogen supposed to be a good coolant, and if it is is it actually used ? 2). If it is a good coolant how does it work as a fuel ? I hope these...

Question: is it possible to have any of the following - 1. Steam engine in a car 2. A steam internal combustion engine 3. A hydrogen internal combustion engine Background info Hi all, I am working on a fiction short story for fun. It is set in a parallel universe so history and a few...

The ionization energy of H2 is 1488 kJ/mol. How strong of a DC electrostatic field would be need to ionize H2 molecules all at a distance 'd' from the source of the field? What I am asking is how to convert the known unit (joule) into a measure of an electrostatic field since electric fields are...

I have read that Lyman series of Hydrogen atom occur on the n = 2 level, and it is due to electron orbital coupling. Suppose I understand what is an electron-orbital coupling, and that one gets 3/2 and 1/2 total angular momentum for n = 2 level. But, from quantum mechanical derivation of the...

At STP, a mole of hydrogen gas would take up 22.4 L. If that hydrogen gas was ionized and stripped of 100% of the electrons, would the remaining protons have a larger volume than 22.4 L? I'm not sure because on one hand, taking away the electrons leaves each proton with much less volume, but on...

Is it true, as someone says, that molecular hydrogen in its fundamental state don't (almost?) absorb in the frequencis of the Balmer series of atomic hydrogen emission spectrum? Thanks. -- lightarrow

I've been following the EdX course on Quantum Computing by Prof. Vazirani and I don't understand how one physically can create a superimposed state of the ground and 1st excited state of an hydrogen atom. He mentions "the use of light," but doesn't explain the frequency of the light, nor the...

Homework Statement Consider photons crossing a large hot ionised hydrogen region with constant electron density ne = 5*105 m-3. Assuming that the photons and the electrons interact via Thomson scattering (with Thomson scattering cross section, σT = 6.65*10-29 m2, what is the thickness Δx that...

Homework Statement Show that for hydrogen the matrix element <2 0 0|z|2 1 0> = -3a0 where a0 is the Bohr Radius. On account of the non-zero value of this matrix element, when an electric field is applied to a hydrogen atom in its first excited state, the atom's energy is linear in the field...

I am confused with the statement given by a website (http://www.chem.ucalgary.ca/courses/351/Carey5th/useful/acidbase.html "Size. When comparing atoms within the same group of the periodic table, the larger the atom the weaker the H-X bond and the lower the electron density making it a weaker...

While studying the generation of electricity using hydrogen fuel cells, I came across a point that "The electrolyte is a thin, fragile sheet of acidic, solid organic polymer about 50 microns (2 thousandths of an inch) thick which permits the passage of Hydrogen ions but is impermeable to...

In the following process flow diagram for the production of hydrogen, why is the amine column placed after 2 heat exchangers?

Plain and simple, is it possible to create H+ Gas? For example, if you had H3O+ and heated it immensely, wouldn't it separate into H2O and H+? Wouldn't there then be a way to separate the H+ out?

I was wondering if alpha particles created by radioactive decay ever have enough energy to fuse with something else (e.g. hydrogen or another alpha particle).

Hi, I am working on investigating an idea I proposed regarding a ramjet that operates in subsonic flow (of a fixed speed) with a convergent intake. That utilizes the pressure immediately behind a standing shock-wave for compression. I have posted a link to my initial report here and I now need...

Homework Statement The energy of an electron in a hydrogen atom is: E = p^2/2m_e - \alpha e^2/r; where p is the momentum, m_e is the electron charge magnitude, and \alpha the coulomb constant. Use the uncertainty principle to estimate the minimum momentum in terms of m_e, a, e, \hbar...

I have also posted this question here: Relationship between surface area of electrode and reaction rate of hydrogen in fuel cells, but I really need an answer before tomorrow morning so I hope you don't mind me posting it here as well! I am looking at the effects of increasing the surface area...

If I am trying to derive the energy eigenvalues and quantum numbers for the hydrogen atom (basic hydrogen-1), I obviously need to solve the hydrogen Schrodinger equation and account for some boundary conditions. However, no website ever gives me the boundary conditions. What would be the...

Homework Statement [/B] The time-averaged potential of a neutral hydrogen atom is given by where q is the magnitude of the electronic charge, and being the Bohr radius. Find the distribution of charge( both continuous and discrete) that will give this potential and interpret your result...

1. The way we solved this problem was proposing that the wave function has to form of ##\Psi=\Theta\Phi R## where the three latter variables represent the anlge and radius function which are independent. The legendre polynomials were the solution to the ##\Theta## part. I am having some trouble...

Homework Statement In a DNA molecule, the base pair adenine and thymine is held together by two hydrogen bonds (see figure below). Let's model one of these hydrogen bonds as four point charges arranged along a straight line. Using the information in the figure below, calculate the...

I'm seeing a version of the potential as -Ze^2/4πεr. My question is what exactly does the Ze^2 refer to? I think the e^2 is supposed to represent the proton and the neutron, and the Z is supposed to represent the number of protons, but I'm not sure how to read it. Does e refer to the charge...

Hello. I just want to know if you guys know a website, place, or store where you can use their apparatus and work on a stainless steel plate? Right now I'm planning to create a Hydrogen generator using water with catalyst. Thank you.

Comets have high Deuterium to Hydrogen ratios. They are enriched with extra neutrons. Comets periodically plunge close to the sun. And, the sun generates flares, which generate neutrons. Separately, I wonder if those neutrons come from fusion of solar corona gas, trapped on magnetic field...

Homework Statement Hi, I've been unable to find a relevant thread for a question that I've been stuck on for a couple of days now. Here it is; One of the electromagnetic emission lines for a hydrogen atom has wavelength 389nm. Assiming that this is a line from one of the Lyman (nf =1 )...

< Mentor Note -- thread moved to HH from the technical forums, so no HH Template is shown > The experiment I'm trying to do can be found in the attachment below. Prepare 20 mL solutions of hydrogen peroxide in the following concentrations: 0%,0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0% hydrogen...

Is that because of some historical reasons or E=mc2(i mean something about binding energy)?

Could anyone please explain why in the book The Physics of Stars it states that the mass of ionized Hydrogen is 0.5AMU, I cannot figure out why it isn't 1.0078AMU minus the mass of an electron?

Greetings, i need the absorption cross section for the absorption of an H-alpha photon by a hydrogen atom, in the correct state of course, which I'm pretty sure is neutral hydrogen, n=2. I am needing this for a project, so i also need a reliable source where this comes from. Thanks beforehand...

A recent issue of Aviation Week described a novel design for a fusion reactor from the Lockheed Skunk Works. It was smaller, simpler and lighter than the extant systems now being built and they're optimistic about it's test run in five years. I wrote a letter to the editor touting this departure...

Why line spectrum of hydrogen includes no X-ray frequencies?

I am wondering and have been thinking, exactly how does the energies of hydrogen atom orbital depend on quantum numbers? I am just curious because all of what I have learned/read discusses only one-dimensional situaiton, like a particle in a box, and I want to know how it can be applied to the...

1. Homework Statement http://postimg.org/image/nuzx91ks7/']How[/PLAIN] many moles of hydrogen are needed to saturate this compound? Homework Equations The Attempt at a Solution http://postimg.org/image/nuzx91ks7/']3[/PLAIN] moles of hydrogen as the benzene ring contains 3 pi bonds. Is...

More acidity means more electronegativity, and more electronegativity means more dipole moments. I observed that liquids with low dipole moments (bases) often have lower density and surface tension, but not necessarily hydrogen bonds. To contradict it, acetic acid have a low surface tension but...

How do you strengthen and weaken hydrogen bonds in water aside from changing its temperature? Could you add any solutes to do so?

Lets take a simple water molecule for example. You can use the photoelectric effect to remove electrons from a molecule. As a thought experiment, let's say you have a contained single water molecule in a vacuum with no impurities. Perfect Vacuum. If you use the Photoelectric effect and beam...

If you draw lewis structure, central atom (N) will have 1 lone pair and 4 single bonds with Hydrogen. Why can't hydrogen in this ion molecule be able to form hydrogen bonding with other molecules alike? Is it because there's only 1 electron on the central atom?See for yourself: 5N + 4H -1 = 9...

Homework Statement I am wondering, is it possible to predict the vibrational frequency of D2 from H2, supposing vibrational frequency of H2 is 4400cm-1? Homework Equations ... The Attempt at a Solution From what I know, H2 has two H's, meaning 2 protons and 2 electrons, whereas D2 has 2...

Today I was studying Atkins physical chemistry basics and I saw a bit of incoherence. ΔrG°=ΔrH°-TΔrS° ΔrG°=ΔfG°(products) - ΔfG°(substrates) ΔrG°=nFE° Data: ... ΔfH° ... ΔfG°...ΔS°(J*K*mol-1) H2(g)...0......0......130,684 H+......0.....0.....0 2H+(aq) 2e- => H2(g) Using second and third...

if you take a hydrogen atom and strip off the electron so that you are left with a proton. does the proton have energy levels around it? can a solitary proton still be regarded as an atom (H+)

I've been wondering what is up with hydrogen. It shares little more than basic commonality with any other atom, this strikes me as strange as all atoms share some properties with those around them on the periodic table whether be it nuclear, physical, or chemical. I asked a reputable source and...

Homework Statement I know this question has been asked before, but I am looking for a different kind of answer than the other poster. Bear with me here. Problem: For a hydrogen atom in the ground state, what is the probability to find the electron between the Bohr radius a0 and (1.01)a0...