Atom Definition and 999 Threads

what is the location of the higgs boson?

This is most likely very simple, but I can't figure it out. http://www.sussex.ac.uk/physics/teaching/btv/Lect02_2006.pdf Step 5 they've got an equation for \Phi. They then normalise it to get A = \frac{1}{\sqrt{2\pi}}. Every time I do the integral I get: A^2.^{2\pi}_{0}[...

Moved. Delete please.

This question is something that's been bothering me for a long time, there has to be a probability in this universe where a single atom is/was floating in space alone without any light exciting it. Clearly there is no heat here, so does the atom approach absolute zero asymptotically? My...

Homework Statement find the magnetic moment of a hydrogen atom given that the election moves at 0.10c around the nucleus and the radius is 0.5*10^-5 m Homework Equations n/a The Attempt at a Solution this is what i did. I = nev =ev (I = current e= charge of electron, v =...

Homework Statement According to classical physics, a charge e moving with an acceleration a radiates at a rate dE/dt = - (e2a2)/(6pi epsilon c3) a) Show that an electron in a classical hydrogen atom spirals into the nucleus at a rate dr/dt = - e4/ (12pi^2 epsilon^2 r^2 me^2c3) b) Find...

I am having a problem with this question in a past exam paper...I may just be being a bit of an idiot: Show that if an H atom is in its ground state the minimum energy photon it can absorb is 1.634x10-18 J. I am using The formula: En2-En1=hcR∞(1/n12 - 1/n22) I keep getting a...

Q. In a particular spectrometer, doubly ionised \stackrel{12}{6}C and singly ionised \stackrel{6}{3}Li atoms are detected. The ratio of the path radii is 1.00252, the Li having the larger value. The fields are constant. Find the mass of of the lithium atom. I can only think of the equation...

Suppose that the electron in the hydrogen atom obeyed classical mechanics rather than quantum mechanics. Why should such a hypothetical atom emit a continuous spectrum rather than the observed line spectrum? So far I have: quantum mechanics deals with the smallest possible piece of a system...

Hey, Sorry, but I have a qustion on the uncertainty principle to join the many others. Just reading a book on physics, and its says that, as a result of the Heisenberg uncertainty principle, if the proton and electron were confined to the same volume of space, the electron would be traveling...

When we solve the hydrogen's atom problem using the Schrodinger equation, we find the eigenstates of energy in the position representation for example. To do that we use the fact that the observables "H, l^2, l_z" have the same eigenstates. My question is about the l_z operator. The z-Axis is a...

As I understand it, a uranium atom should exist in a superposition of its three isotopes (U238,U235,U234). Is this correct? If so, the probability of any isotope being observed should be related to its natural abundance. But this would mean that the probabilities are time dependent, which is...

Homework Statement Heat is added until the rms speed of a helium atom has increased 50%. Find new pressure. (Not all parameters given.) Homework Equations rms = (3kT/m)1/2 mass of molecule = mass of mole/NA Then, mass of helium molecule is 6.6x10-26kg The Attempt at a Solution...

A reactor is producing nuclear energy at the rate of 30000KW.How many atoms of U-235 undergo fission per second?How many kg of U-235 would be used up in 1000 hr of operation.Assume an energy of 200 Mev is released per fission.(Avogadro number=6*10^26 atom/kg)

Homework Statement A photon enters an atom in the ground state. I have the energies to get to the next level. My question is, does the photon have to be the exact energy to get to the next level before it is absorbed, or can the atom absorb it and go up those few levels and.. sort of store the...

Why does in QM the electron does not fall toward the nucleus? After all, the only force between nucleus and electron is attractive. It seems that the electron can and does indeed fall toward the center in <simple harmonic oscillator>? My question is what's so different in these two systems...

Homework Statement the wavelengths of the emission lines produced by the hydrogen atom are given by the formula: 1/lambda = 1.096776 x 10^-2 ((1/n2^2) - (1/n1^2)) nm^-1 (a) what are the wavelengths of the first two lines in the Balmer series, H-alpha and H-beta (involving transitions...

Homework Statement Hi, I am not sure about the following question: (Q) Argon (atomic weight 40) exists as a monatomic gas at room temperature and pressure. The density of liquid argon is 1784kg/m^3. (a) Calculate the atomic density (atoms/m^3) in liquid argon *Done* (b) Hence...

Homework Statement For an electron in a hydrogen atom: in state psi(100): find (del-x)(del-p) where del x = integral of :[psi (x-<x>)2 psi]dv and del p = integral of: [psi(p-<p>)2 psi]dv Homework Equations The Attempt at a Solution i attempted to multiply out both...

Experiments in nuclear magnetic resonance for example, demonstrate that precessing atomic nuclei do it so smoothly. At the same time, atoms have discrete magnetic moments presumably associated with spins. Would anyone care to comment on the difference?

Is there any study about how enzyme work on level atom ? where i can read about subject ?

Homework Statement Okay, I need to work out the Relativistic corrections for an atom, using the First KE Term and the Darwin Term: Calculate the energy shift of the protonium groundstate due to the relativistic correction to the kinetic energy and the Darwin term and compare it to...

Homework Statement In 1989, a new type of exotic atom called protonium was produced. Its structure is hydrogen-like, with the electron replaced by an antiproton. As the antiparticle of the proton, an antiproton has the same mass but opposite charge. In this problem, you should consider...

In a multielectron atom, the lowest-l state for each n (2s, 3s, 4s, etc.) is significantly lower in energy than the hydrogen state having the same n. But the highest-l state for each n (2p, 3d, 4f, etc.) is very nearly equal in energy to the hydrogen state with the same n. Can someone please...

Why is the hydrogen the only atom that depends only on principal quantum number n and for all other elements, energies depend on both orbital quantum number and principal quantum number?

The hydrogen atom 1s wave function is a maximum at r = 0. But the 1s radial probability density, peaks at r = Bohr radius and is zero at r = 0. can someone explain this paradox?

In a multielectron atom, the lowest-l state for each n (2s, 3s, 4s, etc.) is significantly lower in energy than the hydrogen state having the same n. But the highest-l state for each n (2p, 3d, 4f, etc.) is very nearly equal in energy to the hydrogen state with the same n. Explain?

The probe passes over an atom that is 3.20×10^2 nm "tall." The probe passes over an atom that is 3.20×10^2 nm "tall." By what factor does the tunneling current increase?

Homework Statement An atom initially at rest emits a photon. Explain why the mass of the atom decreases, taking into account energy and momentum conservation. The Attempt at a Solution I get the energy conservation part. E=delta(m)c^2=hf. But how would momentum conservation cause an...

Homework Statement The groundstate energy of the hydrogen atom can be calculated using the variational principle. The normalised groundstate wavefunction is: \psi_{100} = R(r)_{10} \cdot Y_{00} with R_{10} = 2Ae^{-3/2}e^(r/a) and Y_{00} = \frac{1}{\sqrt{4z\pi}} A is the so called...

Did Rutherford knew the structure of alpha particles? If so, why was so important the scattering of alpha particles in the gold foil experiment? He knew the structure of helium atom! What is wrong with me? Thanks for your friendly collaboration and excuse me if the post makes no sense.

1. Apply a magnetic field B to a hydrogen like atom. This gives rise to an additional potential energy term of mu_b*B*L_z/hbar a) Show that the eigenfunction PSI_nlm is still an eigenfunction in the presence of the magnetic field b) Show that the eigenvalues are E_n + m*mu_b*B How do...

Homework Statement If the mass of a hydrogen atom is 1.67*10-27kg and the mass of an electron is 9.1*10-31kh, how many electrons would be required to have a mass equivalent to one hydrogen atom? Homework Equations The Attempt at a Solution I tried dividing them into each other...

Homework Statement A mass spectrometer analyzes and gives data for a beam of doubly ionized atoms. The values are q = 2(1.60 x 10^-19 C), B = 5.0 x 10^-2 T, r = 0.120 m, and V = 3442.9 V. Find the mass of one of these atoms. Homework Equations B^2*q*r^2 / 2*v The Attempt at a...

What are the main drawbacks of bohr's model of atom?

How can I calculate the potential energy of the electron when we bring it from the infinity to the distance r?

1. Given that the ground energy level of a hydrogen atom is -13.6eV, the 1st excited state -3.4eV. The difference is 10.2eV. Imagine a photon of energy 11.0eV hits the electron at ground state. What will be the final result? Electron doesn't gets excited, photo bounces off with 11.0eV? or...

A doubly charged helium atom (mass = 6.68 x 10-27 kg) is accelerated through a potential difference of 4.00x 103 V. What will be the radius of curvature of the path of the atom if it is in a uniform 0.450 T magnetic field? the equation i was using was r = mV/|q|B m = 6.68 x 10^-27 V =...

The last few days I've been going back to review the solution of the Schrodinger equation for the Hydrogen Atom. I learned this in school years ago and I review it every 5-10 years just to appreciate it again. However, something very basic is now bothering me, and I was hoping someone could...

My question concerns the orbitals in the atom (s,p,d, and f.) I know that each orbital shell is a probability density that has a quantized energy. My question is, do the orbitals touch, or rather do higher orbitals like say a d have a probability density that overlaps a p or s orbital in a...

Homework Statement A doubly charged helium atom whose mass is 6.6 \times 10^{ - 27} {\rm{kg}} is accelerated by a voltage of 2800 V. What will be its radius of curvature if it moves in a plane perpendicular to a uniform 0.370 -T field? What is its period of revolution?Homework Equations F=qvB...

Homework Statement I have a series of functions, states, and levels that I'm suppose to graph using excel. Only problem is I'm not even sure of what to do. I'm completely confused/lost. Homework Equations n=1 l=0 R(r)=\frac{2}{a_0^{3/2}}e^{-r/a_0} n=2 l=0...

What is the rms speed of helium atom at 2000?

An electron in a hydrogen atom occupies the combined position and spin state. \Psi\left(\vec{r},\xi\right)=\left(\sqrt{1/3}Y^{1}_{0}\xi_{+}+\sqrt{2/3}Y^{1}_{1}\xi_{-}\right) What are the possible measured values of J^{2} (where J is the total angular momentum of the electron L + S) and...

Homework Statement What is the average kinetic energy of an atom of helium gas at a temperature of 20 degrees C? Homework Equations N/A The Attempt at a Solution Here's my attempt at a solution: Using the equation E = kT/2 for each degree of freedom, I found that KE = 3kT/2...

a simple atom is comprised of one electron and one proton, with a distance of R=0.5*10-10m between them 1) what is the electric force between them F=K(qq)/r2 = 28.8N ------------------------------ 2)how much smaller than the electric force is: a) the gravitational force of the...

Homework Statement (a) Is the mass of a hydrogen atom in its ground state larger or smaller than the sum of the masses of a proton and an electron? b) What is the mass difference? c) How large is the difference as a percentage of the total mass? d) Is it large enough to affect the value of...

since the atom is not the smallest breakdown of matter is it possible that a unit exploded developing neutron, proton and electron. ?

It may sound stupid but is it possible that the force of gravity in a black hole is strong enough to nuclear fuse all of the atoms in a black hole? I am won't understand anything complex so try to keep it as simple as possible. (also, how do you calculate mass? I don't understand the equation...

Has anybody ever considered the effects of curved spacetime on an atom? I know that an atom is subject to QM, but it still is significantly larger than the Plank scale, so would the standard formulas of GM still apply? I also know that in the small vicinity of an atom, spacetime is basically...