What is Nucleus: Definition and 420 Discussions

nuCLEus is a proposed mixed-used development complex planned for the Gateway District of downtown Cleveland, Ohio, United States. The project won unanimous approval from the Cleveland Planning Commission in November 2014, and recently received schematic design approval from the City of Cleveland in March 2019 after a thoughtful redesign to fit the city's growing population and needs in downtown Cleveland.Robert L. Stark of Cleveland-based Stark Enterprises is the lead developer on the nuCLEus.
The $300M mixed-use project will encompass approximately two million square feet in the heart of the city at the intersection between East Fourth Street, Prospect Avenue and Huron Road, connecting many of the venues in the Central Business District.
nuCLEus will serve as a mixed-use, vertically integrated space with a mix of Class A office space, retail, restaurants and residential living divided between two distinct, 24 floor towers.

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  1. J

    Positron to replace proton as the nucleus of an atom

    I know that the positron and electron have the same mass, which allows them to annihilate, and I know how solve the 2 body Schrodinger for a standard hydrogen atom to get the orbitals. My question is why the math works out the way it does. Is there an "intuitive" (I use that word cautiously)...
  2. C

    Binding energy of a nitrogen nucleus

    Homework Statement Hi guys, any help here would be greatly appreciated. I'm told that a carbon-12 atom fuses with a hydrogen nucleus with the atomic mass of 1 to form a nucleus of nitrogen releasing 1.95 MeV as a result. I'm asked to write an equation of the reaction and work out the...
  3. O

    Alpha Rays and the Movement of Atoms' Nucleus

    I don't know much thing about rays. When I was studying Rutherford experiment, I saw that nucleus scattered the alpha rays with Coulomb forces, and naturally the opposite forces effect the nucleus. So do the nucles of atom moves to the direction of alpha rays' first direction?
  4. F

    Why are protons in the nucleus and electrons aren't?

    Homework Statement Why are protons in the nucleus and electrons aren't?? The Attempt at a Solution So this is the question I was asked. I understand that protons are held together by nuclear (or strong) force. I understand that an atom is stable because there's an equilibrium...
  5. N

    Magnitude of the electric force a hydrogen nucleus exerts on electron?

    Homework Statement What is the magnitude of the electric force a hydrogen nucleus exerts on its only orbiting electron in the Bohr model? The Attempt at a Solution Fe = kQq/r^2 Since there is one proton and one electron. Q and q are equal to each other: 1.6 x 10^-19. k = 9 x...
  6. G

    Alpha particle approaching gold nucleus

    An alpha particle is thrown toward a gold nucleus. An alpha particle has two neutrons and two protons and a load module 2e, where "e" is the electron charge, while the gold nucleus has 79 protons and a load module 79e. What is the minimum kinetic energy that the alpha particle must have in order...
  7. S

    Spining of protons and its effect on stability of nucleus

    dear sir, i heard that that proton spins about itselfand this helps in stability of nucleus. i also heard from the a friend that neutron has a proton and electron within it. this electron moves out from neuton making it proton and entering proton to form a neutron. sir i need to know...
  8. S

    Structure of Nucleus: Proton & Neutron Arrangement

    dear sir, I am curious to know the way protons and neutron are arranged in the nucleus and movement of protons and neutrons in the nucleus.please guide me.
  9. B

    Single particle shell model for nucleus

    Homework Statement Predict the ground state spin and parity for ^{7}_{3}Li, ^{15}_{7}N. ^{31}_{15}P. Homework Equations Fill up shells for neutrons and protons separately. Shells in increasing energy are: 1S_{1/2}, 1P_{3/2}, 1P_{1/2}, 1S_{1/2}, 1D_{5/2}, 1D_{3/2} and have...
  10. M

    Possible webpage title: Understanding Nucleus Spin in Atoms

    does nucleus in an atom spin?
  11. L

    Classical, electrons fall into nucleus, why not planets into sun?

    How is electromagnetism different from gravity in that accelerated objects radiate EM waves when accelerated in an electric field but no gravitational waves are generated when objects are accelerated in a gravity field? Why do not planets orbiting the sun generate gravitational waves and...
  12. M

    Magnitude of the current flowing around the nucleus in the Bohr mode

    magnitude of the "current" flowing around the nucleus in the Bohr mode Homework Statement According to the Bohr model, a hydrogen atom in its lowest energy state has a nucleus consisting of a single proton, which is orbited by a single electron. The speed of the electron is 2.19×106 m/s and...
  13. M

    Deriving potential energy of an electron inside a nucleus

    Homework Statement Derive equation below. It is the potential energy of an electron inside a nucleus assumed to be a uniformly charged sphere of R. Homework Equations V'(r) =( -Ze2/4∏ε0R)(3/2 - (1/2)(r/R)^2) The Attempt at a Solution So I understand that I need to find the ∫ from infinity...
  14. S

    About neutrons and proton in nucleus

    sir i want to know why is number of neutron is more or equal number of proton in nucleus of atoms whose atomic number is more tnan one?
  15. G

    Distribution of protons in nucleus

    Is the most stable/likely configuration of protons in heavy nuclei that of being evenly distributed throughout the nucleus? As opposed to something like a spherical distribution?
  16. E

    Orbitals and Nucleus - Quick question

    Just a quick question - how come that for electrons we need probability orbitals, but for the nucleus we don't? Is it because of the difference in mass? Or because of a bigger matter wavelength? Can we really pinpoint the location of the nucleus or ist it just easier for textbooks to depict it...
  17. N

    Does the nucleus of atoms of noble gases vibrate and emit E.M wave

    People normally talk of electrons performing oscillatory motion when an electromagnetic field is incident on an atom. But, won't the electric field of the E.M. wave cause the nucleus of the atom to vibrate...? . "Note: Here I am talking of isolated atoms, that is atoms of noble gases, and not...
  18. D

    Electron far away from the nucleus of ground state H atom

    The wave function of an electron in ground state hydrogen atom is non-zero at points far away from the nucleus. Interpreted as the probability of finding the electron, this is telling us that there is a finite probability of finding an electron far away from the nucleus even if it is at ground...
  19. D

    Uncertainty principle for electron in nucleus

    Hello, I have this exercise and want to check if what i did is correct Homework Statement Nuclei, typically of size $10^{-14}$ m, frequently emit electrons with energies of 1-10 MeV. Use the uncertainty principle to show that electrons of energy 1 MeV could not be contained in the nucleus...
  20. M

    Why do electrons with orbitals farther from the nucleus have greater e

    If the electrons closer to the nucleus experience greater electrostatic attraction from the nucleus, would not the closer electrons require more energy to stay in orbit? Also, the electron shielding from the inner electrons would reduce the energy required to stay farther away from the nucleus...
  21. sunrah

    Velocity of alpha particle within nucleus

    Hi, The decay constant for alpha decay is the product of the transmission probability P and the collision frequency f of the alpha with the potential barrier, where f depends on velocity of the alpha in the nucleus. My question is about this Hyperphysics page, where alpha decay is modeled...
  22. Enigman

    Probability of finding electrons in nucleus (s orbitals)

    Why is the probability of finding an electron of s orbital in the nucleus highest? Is Quantum Tunneling involved? If so, won't the electron need a large amount of energy to pass through the nucleus?
  23. B

    Exploring Alpha Decay: The Science Behind Helium Nucleus Emission

    Why does alpha decay emit a helium nucleus.Why not a proton or gamma rays. Please help me understand the science behind why it emits this?
  24. A

    Why nuclear radiations occur in atoms with large nucleus?

    why nuclear radiations occur in atoms with large nucleus?Is it the weakening of residual strong force? If so why it gets weak ?
  25. O

    Kinetic energy of a nucleus

    Hello everybody, I am a first year student and I have a question that I am not sure if I can answer. A radioactive isotope of Tin(50), with 85 neutrons in its nucleus and without any electrons bound to it, undergoes a beta minus decay. The electron pops into existence, 10-15m from the center of...
  26. H

    Kind of condensation nucleus

    i will experiment about condensation nucleus. ( make cloud artificial. is my topic ) in my experiment i need high efficiency of condensation nucleus high efficiency mean which one can drop temperature faster and lower please know me some
  27. HakimPhilo

    How the nuclear binding energy gives mass to the nucleus?

    Hello everybody! :wink: I have some difficulties concerning the concept of nuclear binding energy. First, look at this example: http://www.freeimagehosting.net/newuploads/jtefo.png In the first case, the two protons have big energy. But this energy is not changing it's weight. And in the...
  28. T

    Atom when electrone is bombarded inside the nucleus

    what will happen TO THE ATOM if electron end up inside the nucleus ( as in quantum tunnelling) ?
  29. J

    How does an atomic nucleus have a measurable diameter

    How is this possible if quarks are point particles?
  30. Y

    Radioactive nucleus - why is alpha emitted and not proton

    So I recently heard of a simple way of thinking about how the emission of an alpha particle is "beneficial" to a nucleus being stable. The argument goes as follows: "Let's say we have a nucleus that is unstable because the electric repulsion of protons can't balance out the strong force...
  31. O

    For a electron orbiting around the nucleus, why must it be in phase?

    Why nλ= 2∏r? this is the explanation from website , Now, one complete orbit has the same length as the circumference of the circle that the orbit traces out, so is given by 2πr. This distance must be equal to an integral number of wavelengths. (If it were not, the wave traced out by the...
  32. A

    Archived Binding energy and deuterium nucleus

    Homework Statement a) Calculate the average binding energy per nucleon in the deuterium nucleus. b) The energy that binds an orbiting electron to the hydrogen nucleus is 13.4eV. Calculate the ratio of the binding energy per nucleon to the binding energy per electron in deuterium. Which...
  33. F

    Hydrogen atom probability of electron inside nucleus

    Homework Statement The ground state of the hydrogen atom has the wavefunction: \psi (r) = \frac{1}{\sqrt{\pi}} (\frac{1}{a_{0}})^{\frac{3}{2}} e^{-r/a_{0}}, where a_{0} = 0.53Å a) Calculate the probability that an electron will be found inside the nucleus of the hydrogen atom, which is...
  34. sunrah

    Calculate form factor of nucleus

    Homework Statement Calculate form factor of nucleus (A, Z given). Radius R = 1.2\cdot10^{-15}A^{\frac{1}{3}}Homework Equations F(\textbf{q}) = \frac{1}{Ze} \int d^{3}\textbf{r} \rho(r)e^{i\textbf{q}\cdot \textbf{r}}The Attempt at a Solution using polar coords d^{3}\textbf{r} = r^{2}dr...
  35. D

    Distance of electron from nucleus

    Homework Statement a) Consider a hydrogenic atom consisting of a carbon-12 nucleus and a single electron. What is the wavelength of the photon emitted when this atom drops from n = 5 to the n = 2 state? b) According to the Bohr theory, what is the distance between the electron and the...
  36. P

    Why does a deuteron nucleus have spin 1? Hydrogen spin 1/2?

    I'm learning about NMR and it's been stated that deuteron has a spin 1 nucleus and so should exhibit different behavior. Why? I've heard of electrons having spin, and now protons, but I don't see why the spin of a neutron should matter since it's uncharged. I'm thinking a spin of 1 means...
  37. N

    Find Nucleus Radius: Mass vs. Formula

    How do I find the radius of the nucleus if given the mass? I am asked to compare it with the value found using the formula R= 1.2 A^(1/3)
  38. M

    What Determines the r_0 Constant in Nuclear Radius Calculations?

    I've been noticing that for expressions finding the nuclear radius there is a constant term r_0, that I can't seem to find an explanation for. The full term is R=r_{0}A^{1/3} That the atomic radius is roughly the 3rd root of the number of nucleons. But where is the r_0 coming from? I'm using...
  39. G

    Fermi energy of nucleus

    How is it that the calculated Fermi energy of neutrons and protons in a heavy nucleus are different, but it's observed that they have the same energy? And how much is the Coulumb repulsion of the protons play a factor in that?
  40. skate_nerd

    Coulombs law, initial speed to collide with other nucleus

    Homework Statement A helium nucleus has radius rHe = 1.9 fm, mass m = 6.6 × 10-27 kg, and charge +2e. A gold nucleus has charge +87e and radius rAu = 7.0 fm. What initial speed must a helium nucleus have if it is to come into contact with a fixed gold nucleus in a head on collision...
  41. S

    QM approximation (electron within nucleus, Griffiths 4.45b

    Homework Statement What is the probability that an electron in the ground state of hydrogen will be found inside the nucleus? a) First calculate the exact answer, assuming the wave function \psi(r,\theta,\phi) = \frac{1}{\sqrt{\pi a^3}} e^{-r/a} is correct all the way down to r=0. Let b be the...
  42. A

    Finding the Force of Nucleus on a Single Electron of Plutonium

    Homework Statement A particular nucleus of the element Plutonium contains 94 protons and 150 neutrons. What is the magnitude of the force from the nucleus on a single electron that is a distance of 0.563x10-12 m from the Plutonium nucleus? So basically this was a homework question that I...
  43. DiracPool

    Quantum mechanics for the nucleus?

    How come I never see any equivelant of the particle in the box or harmonic oscillator counterparts for modeling of the atomic nucleus? I'm still a bit new to QM, but the only thing I ever see are QM descriptions of electrons, electron orbitals, electron spins, electron quantum entanglement...
  44. M

    What is a meta nucleus in context of biology?

    So, I was in botany class the other day and we were going over the model of a flower describing the parts. The ovum, the egg and polar bodies and someone said another name for the polar bodies and my teacher said she would accept the answer if we knew what a meta nucleus is. Naturally no one...
  45. W

    The lifetime of an unstable nucleus

    protons and neutrons interact with each other with the strong force, which is very strong however, there are many unstable nucleus which have a lifetime in the order of millions of years this is quite strange the time scale of strong interaction is many many orders smaller than that of...
  46. W

    Nucleus absorption of neutron

    can anyone give an example in which a nucleus absorbs a neutron and becomes a stable nucleus? or the combination must break into parts?
  47. C

    Finding radius of nucleus from semi-empirical mass formula?

    Homework Statement The nuclei ^{41}_{21}Sc and ^{41}_{20}Ca are said to be a pair of mirror nuclei. If the binding energy of ^{41}_{21}Sc and ^{41}_{20}Ca is 343.143 MeV and 350.420 MeV, respectively, estimate the radii of the two nuclei with the aid of the Semi-Empirical Mass Formula...
  48. phosgene

    Minimum energy of electron bound in nucleus

    Homework Statement An electron is confined to a nucleus of radius 4 femtometres. Estimate its minimum energy. Homework Equations ΔxΔp_x=h/4\pi E^2=p^2c^2 + m^2c^4 As the electron's rest energy will be much less than it's kinetic energy, E=pc The Attempt at a Solution So I...
  49. M

    An Electron coming from the nucleus in Beta Decay?

    Hi guys, essentially I have been talking with my Physics teacher about Beta Decay and she was saying that sometimes electrons come from the nucleus because of the quarks in the protons and the neutrons? I didn't fully understand it so I have likely got it wrong what she was trying to explain. Do...
  50. E

    Fission of Uranium-235: Deciding Outcomes & Isomers

    1.Uranium-235,after taking a neutron turns into Xe and Sr and 2 neutrons or it turns into Ba and Kr and 3 neutrons or many other things. How it is decided that Ur nucleus will change into what? 2.Why aren't we still using fusion to produce energy? 3. Isomers-what's the reason behind the...
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