
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
... a) Find the eigenvalue E of H = E b) Show that the above obtained eigen value in terms of the classical frequency = (1/2)(k/m) and the constant a = (/h)(km)1/2 is E = (1/2)h. ...
... a) Find the eigenvalue E of H = E b) Show that the above obtained eigen value in terms of the classical frequency = (1/2)(k/m) and the constant a = (/h)(km)1/2 is E = (1/2)h. ...
Physical Science
... Lab reports – What should be included in: a correct hypothesis? A correct procedure? A correct conclusion? How would you write a correct example of each part? Measuring in metric – What metric units are used to measure: mass? Volume? Length? Convert metric units – How do you use a chart to con ...
... Lab reports – What should be included in: a correct hypothesis? A correct procedure? A correct conclusion? How would you write a correct example of each part? Measuring in metric – What metric units are used to measure: mass? Volume? Length? Convert metric units – How do you use a chart to con ...
Chapter 28
... His model includes both classical and non-classical ideas His model included an attempt to explain why the atom was stable ...
... His model includes both classical and non-classical ideas His model included an attempt to explain why the atom was stable ...
QUANTUM NUMBERS
... Pauli Exclusion Principle - states that no 2 electrons in an atom have the same 4 quantum numbers (usually you place 1 electron with and the other electron ) Aufbau Principle – an energy sublevel must be filled before moving into the next higher energy sublevel Hund’s Rule – one electron is ...
... Pauli Exclusion Principle - states that no 2 electrons in an atom have the same 4 quantum numbers (usually you place 1 electron with and the other electron ) Aufbau Principle – an energy sublevel must be filled before moving into the next higher energy sublevel Hund’s Rule – one electron is ...
A Brief History of Modern Physics and the development of the
... name "photon" came later!) to explain the photoelectric effect. A photon is a quantum (packet) of electromagnetic radiation, with energy ...
... name "photon" came later!) to explain the photoelectric effect. A photon is a quantum (packet) of electromagnetic radiation, with energy ...
NAME PRACTICE: QUANTUM CONFIGURATIONS 1) Each of the
... ___20) The ground-state configuration for the atoms of a transition element ___21) The ground-state configuration of a negative ion of a halogen ___22) The ground-state configuration of a common ion of an alkaline earth element Use these answers for questions 23-25. (1) Heisenberg uncertainty princi ...
... ___20) The ground-state configuration for the atoms of a transition element ___21) The ground-state configuration of a negative ion of a halogen ___22) The ground-state configuration of a common ion of an alkaline earth element Use these answers for questions 23-25. (1) Heisenberg uncertainty princi ...
Midterm Review.ppt - Chemistry R: 4(AE)
... • A student investigated the physical and chemical properties of a sample of unknown gas and then investigated the gas. Which statement represents a conclusion rather than an experimental observation? 1. The gas is colorless. 2. The gas is carbon dioxide. 3. When the gas is bubbled in limewater, th ...
... • A student investigated the physical and chemical properties of a sample of unknown gas and then investigated the gas. Which statement represents a conclusion rather than an experimental observation? 1. The gas is colorless. 2. The gas is carbon dioxide. 3. When the gas is bubbled in limewater, th ...
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI
... State any two postulates of quantum mechanics. Prove that the square of the angular momentum commutes with its components. What is meant by degeneracy of an energy level? What is an orthonormal basis? With an example explain simultaneous eigenfunctions. If A and B are two operators, then show that [ ...
... State any two postulates of quantum mechanics. Prove that the square of the angular momentum commutes with its components. What is meant by degeneracy of an energy level? What is an orthonormal basis? With an example explain simultaneous eigenfunctions. If A and B are two operators, then show that [ ...
constructive - Purdue Physics
... 2) Why only certain orbits are possible? It means that new physical principles operate at distances of the atomic size. A new length scale brings in new physics! 1) Is explained by Heisenberg’s uncertainty principle. 2) Is explained by De Broglie’s particle-wave duality. In fact it is necessary to d ...
... 2) Why only certain orbits are possible? It means that new physical principles operate at distances of the atomic size. A new length scale brings in new physics! 1) Is explained by Heisenberg’s uncertainty principle. 2) Is explained by De Broglie’s particle-wave duality. In fact it is necessary to d ...
LESSON No. 2 – Structure of atom
... Write the property of cathode rays. Explain the J. J. Thomson experiment. Calculate the total number of electron present in 1.6 gm of methane. Calculate the mass percentage of CuFes2. The molecular mass of an organic compound is 78 and its percentage composition is 92.4% C and 7.6% H find out the mo ...
... Write the property of cathode rays. Explain the J. J. Thomson experiment. Calculate the total number of electron present in 1.6 gm of methane. Calculate the mass percentage of CuFes2. The molecular mass of an organic compound is 78 and its percentage composition is 92.4% C and 7.6% H find out the mo ...
2 - Physics at Oregon State University
... • Also called “spin”, or spin angular momentum, or S • It’s a “degree of freedom”, or quantum number: a “state” the particle has • Does interact with magnetic fields like L, but not continuous! • NOT a physical rotation • INTRINSIC property – like charge and rest mass! We have no model for what “mak ...
... • Also called “spin”, or spin angular momentum, or S • It’s a “degree of freedom”, or quantum number: a “state” the particle has • Does interact with magnetic fields like L, but not continuous! • NOT a physical rotation • INTRINSIC property – like charge and rest mass! We have no model for what “mak ...
in-class worksheet
... Contributors to the quantum mechanical model in mid-1920s: Louis deBroglie Erwin Schrödinger Werner Heisenberg Schrödinger – treat e– as a wave Schrödinger equation: Ĥ = E solve to get wave functions, which predict locations of electrons wave function = ORBITAL – region with 90% probability of hol ...
... Contributors to the quantum mechanical model in mid-1920s: Louis deBroglie Erwin Schrödinger Werner Heisenberg Schrödinger – treat e– as a wave Schrödinger equation: Ĥ = E solve to get wave functions, which predict locations of electrons wave function = ORBITAL – region with 90% probability of hol ...
Slide 1
... 1. Compared to the charge and mass of a proton, an electron has: 1. the same charge and a smaller mass 2. the same charge and the same mass 3. an opposite charge and a smaller mass 4. an opposite charge and the same mass ...
... 1. Compared to the charge and mass of a proton, an electron has: 1. the same charge and a smaller mass 2. the same charge and the same mass 3. an opposite charge and a smaller mass 4. an opposite charge and the same mass ...
The energy
... Things get a bit more complicated with the five d orbitals that are found in the d sublevels beginning with n = 3. To remember the shapes, think of “double dumbbells” …and a “dumbbell with a donut”! ...
... Things get a bit more complicated with the five d orbitals that are found in the d sublevels beginning with n = 3. To remember the shapes, think of “double dumbbells” …and a “dumbbell with a donut”! ...
Chapter 1: Atomic Structure
... momentum. The discrete distances from the nucleus described by Bohr corresponded to permissible distances where standing waves could exist. De Broglie’s model of the atom described electrons as matter waves in standing wave orbits around the nucleus. The first three standing waves corresponding to t ...
... momentum. The discrete distances from the nucleus described by Bohr corresponded to permissible distances where standing waves could exist. De Broglie’s model of the atom described electrons as matter waves in standing wave orbits around the nucleus. The first three standing waves corresponding to t ...
chapter 3.4: the bohr atomic theory
... Each of these specific quantities is called a quantum of energy. In other words, Planck said that the energy of an atom is quantized. Something that is quantized can exist only in certain discrete amounts. It is not continuous. Although Planck said that the energy of matter is quantized, he continue ...
... Each of these specific quantities is called a quantum of energy. In other words, Planck said that the energy of an atom is quantized. Something that is quantized can exist only in certain discrete amounts. It is not continuous. Although Planck said that the energy of matter is quantized, he continue ...
Bohr model
In atomic physics, the Rutherford–Bohr model or Bohr model, introduced by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar in structure to the solar system, but with attraction provided by electrostatic forces rather than gravity. After the cubic model (1902), the plum-pudding model (1904), the Saturnian model (1904), and the Rutherford model (1911) came the Rutherford–Bohr model or just Bohr model for short (1913). The improvement to the Rutherford model is mostly a quantum physical interpretation of it. The Bohr model has been superseded, but the quantum theory remains sound.The model's key success lay in explaining the Rydberg formula for the spectral emission lines of atomic hydrogen. While the Rydberg formula had been known experimentally, it did not gain a theoretical underpinning until the Bohr model was introduced. Not only did the Bohr model explain the reason for the structure of the Rydberg formula, it also provided a justification for its empirical results in terms of fundamental physical constants.The Bohr model is a relatively primitive model of the hydrogen atom, compared to the valence shell atom. As a theory, it can be derived as a first-order approximation of the hydrogen atom using the broader and much more accurate quantum mechanics and thus may be considered to be an obsolete scientific theory. However, because of its simplicity, and its correct results for selected systems (see below for application), the Bohr model is still commonly taught to introduce students to quantum mechanics or energy level diagrams before moving on to the more accurate, but more complex, valence shell atom. A related model was originally proposed by Arthur Erich Haas in 1910, but was rejected. The quantum theory of the period between Planck's discovery of the quantum (1900) and the advent of a full-blown quantum mechanics (1925) is often referred to as the old quantum theory.