From Bohr's atomic model, write an equation giving the wavelength emitted when an electron goes from an initial level to a final level, as a function of: the mass of the electron, the charge of the electron, the speed of light, the coulomb constant, the Planck constant and the final and initial levels. Isolate Planck's constant (do not completely redo the theory of the Bohr model). It is normal that the equation is imposing.

What is the velocity of an electron with a deBroglie wavelength of 2.74 um ? Give your answer in m/s with no decimal places please.

The root mean square speed of the hydrogen molecules at temperature t °C is given by 3x8.31 x (t+273) m 2 x 10-3 Calculate the de Broglie wavelength (in nanometers) of the hydrogen molecules at temperature 24 °C. The mass of the hydrogen molecule is 2 x 1.66 x 10-27 kg. Use two decimals in your answer.

Consider the Bohr model of the doubly ionized lithium ion (3 protons) with a single electron. The ground state energy is -122.4 ev What is the kinetic energy for the electron in orbit? eV Write down the relationship between the kinetic energy K, the momentump and the mass m K= write your answer as a formula, e.g. z=x^4/3y Use these to find the de Broglie wavelength of the electron in this orbit: The de Broglie wavelength is nm If the electron is actually a standing wave, what radius does this suggest for the electron's orbit? ro = nm Assuming classical uniform circular motion for the electron in the Coulomb potential at the radius computed above, what is the total energy of the atom? The potential energy is Oze?/(4tte ro) Ze2/ (4πε ro) O-ze?/(8te ro) Oze/ (8πε r0) The kinetic energy is Οze2/ (4πε r0 ) Ο-Ze2/ (4πε r0) O-Ze2/(8ne r0) Οze2/ (8πε r0) The total energy is Oze2/ (4πε r ) O-Ze2/(4ne r0) O-Ze2/(8te r0) OZe2/ (8πε r0) Hence the total energy is ev

Why didn't Bohr use the concept of de Broglie waves in his theory? Explain. Please Answer my question Im needed Max 30 minutes please.... Thank u

Explain the physics behind the fourth assumption in Bohr's atomic model, i.e., mevr-nh/2, where me and v are the mass and velocity of electron around the nucleus, respectively, r is the radius of an allowed orbit, n is an integer and h is the Plank constant.

Let’s consider the DeBroglie principle for electron microscopy. In electron microscopy, the energy of the electron is given by the product of the electron charge, e, and the voltage V. If the voltage is 200 kV, calculate the: a. electron velocityb. electron wavelength

Question A3 Cesium hydride, CsH, has the cesium chloride structure with unit cell parameter a = 3.82 Å. a) Calculate the Coulomb (ionic) energy of CsH, assuming that the ions have their formal charges Cs and H. Give your answer in kJ mol-1. b) A neutron diffraction pattern was measured from a powder sample of this material. The neutron scattering length of Cs is 5.42 fm and of H is -3.74 fm. Calculate the structure factor and multiplicity of (i) the (200) diffraction peak; and (ii) the (210) diffraction peak. Hence (iii) estimate the ratio of the intensity of the (200) to the (210) peak in the diffraction pattern.

Calculate the velocity (in m/s) of an electron that has a wavelength of 8.76 µm.  m/s (b) Through what voltage (in V) must the electron be accelerated to have this velocity? (Assume the electron starts at rest.)  V

Consider the atomic spectra for the H-atom: the Lyman series emits UV photons, the Balmer series emits visible photons, the Paschen series emits IR photons, and the Brackett series emits far IR photons. What type of photons would you expect from the next series? Briefly explain.