Slide 1
... Einstein remembered for E = mc2 m = E/c2 = (hc/λ)/c2 = h/λc This appears to say that a photon of a certain wavelength has mass! Proved by Arthur Compton in 1922 E-M radiation is both waves & little packets of energy and matter called photons De Broglie 1923: if light has wave-particle duality, then ...
... Einstein remembered for E = mc2 m = E/c2 = (hc/λ)/c2 = h/λc This appears to say that a photon of a certain wavelength has mass! Proved by Arthur Compton in 1922 E-M radiation is both waves & little packets of energy and matter called photons De Broglie 1923: if light has wave-particle duality, then ...
PHY 410 Final Examination, Spring 2008 April 30, 2008 (5:45-7:45 p.m.)
... 4. Consider an atom with spin S=1 in a crystalline solid at temperature T. The three microstates of the atom are given by m = 1,0,−1 . In the presence of both crystalline field and an external magnetic field B, the energy levels are given by E ( m) = ∆ m 2 − µmB , where ∆ is a constant energy depen ...
... 4. Consider an atom with spin S=1 in a crystalline solid at temperature T. The three microstates of the atom are given by m = 1,0,−1 . In the presence of both crystalline field and an external magnetic field B, the energy levels are given by E ( m) = ∆ m 2 − µmB , where ∆ is a constant energy depen ...
Fall Final 2009
... 1. A sample that cannot be separated into two or more substances by physical means is: a. A compound b. An element c. Either a compound or an element d. A homogeneous mixture e. A heterogenous mixture 2. Given the following enthalpies of formation, Hf°: CH4(g), -74.8 kJ/mol; H2O(g), -242 kJ/mol; CO ...
... 1. A sample that cannot be separated into two or more substances by physical means is: a. A compound b. An element c. Either a compound or an element d. A homogeneous mixture e. A heterogenous mixture 2. Given the following enthalpies of formation, Hf°: CH4(g), -74.8 kJ/mol; H2O(g), -242 kJ/mol; CO ...
Chapter 6 | Thermochemistry
... (b) The set of quantum numbers n = 3, = 1, m = 0 describes one of the 3p orbitals that can be occupied by two electrons. (c) The set of quantum numbers n = 4, = 2 describes the set of 4d orbitals. There are five d orbitals in the subshell so 10 electrons can occupy this orbital set. (d) The set of q ...
... (b) The set of quantum numbers n = 3, = 1, m = 0 describes one of the 3p orbitals that can be occupied by two electrons. (c) The set of quantum numbers n = 4, = 2 describes the set of 4d orbitals. There are five d orbitals in the subshell so 10 electrons can occupy this orbital set. (d) The set of q ...
Lecture 26
... the crystal lattice) raises its resistance, and the last effect explains why the resistance of a metal goes up with temperature (positive temperature coefficient). τ, and therefore λ, depends on all these things, but in typical cases such as Cu at room temperature, λ might be about 500 angstroms, wh ...
... the crystal lattice) raises its resistance, and the last effect explains why the resistance of a metal goes up with temperature (positive temperature coefficient). τ, and therefore λ, depends on all these things, but in typical cases such as Cu at room temperature, λ might be about 500 angstroms, wh ...
Document
... (i) Explain the terms elastic collision and inelastic collision An elastic collision is a collision in which the total kinetic energy of the colliding bodies after collision is equal to their total kinetic energy before collision. Elastic collisions occur only if there is no conversion of kinetic en ...
... (i) Explain the terms elastic collision and inelastic collision An elastic collision is a collision in which the total kinetic energy of the colliding bodies after collision is equal to their total kinetic energy before collision. Elastic collisions occur only if there is no conversion of kinetic en ...
Chapter 6 Electronic Structure of Atoms
... Explanation: The de Broglie wavelength of an object can be calculated by remembering that 1 J = 1 kg•m2•s-2, which changes h = 6.626 x 10-34 kg •m2•s-1. Now using the formula that relates the mass and velocity of an object to its wavelength, the wavelength can be calculated as follows: ...
... Explanation: The de Broglie wavelength of an object can be calculated by remembering that 1 J = 1 kg•m2•s-2, which changes h = 6.626 x 10-34 kg •m2•s-1. Now using the formula that relates the mass and velocity of an object to its wavelength, the wavelength can be calculated as follows: ...
Basic Chemistry Lecture Notes - Roderick Biology
... • Made up of Protons and Neutrons • Contains most of the mass ...
... • Made up of Protons and Neutrons • Contains most of the mass ...
8. Molecular Geometry
... Bonds are polar when one atom is positive and the other negative. Molecules with many atoms have polarity, with one end positive, the other negatively charged. You can predict the polarity of the molecule by looking at the ends of the molecule to see if it has a positive end and a negative end. Lone ...
... Bonds are polar when one atom is positive and the other negative. Molecules with many atoms have polarity, with one end positive, the other negatively charged. You can predict the polarity of the molecule by looking at the ends of the molecule to see if it has a positive end and a negative end. Lone ...
The Bohr Atom
... number of energy states are allowed and not the infinite number allowed according to classical physics. He therefore introduced the concept of stationary states within the atom, which corresponded to the quantised energy states which were introduced by Planck and Einstein to account for the spectrum ...
... number of energy states are allowed and not the infinite number allowed according to classical physics. He therefore introduced the concept of stationary states within the atom, which corresponded to the quantised energy states which were introduced by Planck and Einstein to account for the spectrum ...
Chapter 3
... The amount of energy given off at a certain temperature depends on the wavelength. Classical physics failed to completely explain the phenomenon. Assumed that radiant energy was continuous; that is, could be emitted or absorbed in any amount. Max Planck suggested that radiant energy is only emitte ...
... The amount of energy given off at a certain temperature depends on the wavelength. Classical physics failed to completely explain the phenomenon. Assumed that radiant energy was continuous; that is, could be emitted or absorbed in any amount. Max Planck suggested that radiant energy is only emitte ...
Ψ (x,t) = | Ψ (x,t) - University of Notre Dame
... (0) A wavefunction Ψ(x,t) must exist and satisfy the equation For the spatial part of the wavefunction… (see below how to separate the spatial and timelike parts) (1) assume the solution (probability) and any spatial derivatives are continuous – they have no discontinuities. (2) they both go to zero ...
... (0) A wavefunction Ψ(x,t) must exist and satisfy the equation For the spatial part of the wavefunction… (see below how to separate the spatial and timelike parts) (1) assume the solution (probability) and any spatial derivatives are continuous – they have no discontinuities. (2) they both go to zero ...
Atomic and Molecular Structure
... as H2 , CH4 , NH3 , H2 CCH2 , N2 , Cl2 , and many large biological molecules are covalent. c. Students know salt crystals, such as NaCl, are repeating patterns of positive and negative ions held together by electrostatic attraction. d. Students know the atoms and molecules in liquids move in a rando ...
... as H2 , CH4 , NH3 , H2 CCH2 , N2 , Cl2 , and many large biological molecules are covalent. c. Students know salt crystals, such as NaCl, are repeating patterns of positive and negative ions held together by electrostatic attraction. d. Students know the atoms and molecules in liquids move in a rando ...
1a) Charged particles in matter :-
... 4) Valency :Valency is the combining capacity of an atom of an element. The electrons present in the outermost shell of an atom are called valence electrons. If an atom’s outermost shell is completely filled, they are inert or least reactive and their combining capacity or valency is zero. Of the in ...
... 4) Valency :Valency is the combining capacity of an atom of an element. The electrons present in the outermost shell of an atom are called valence electrons. If an atom’s outermost shell is completely filled, they are inert or least reactive and their combining capacity or valency is zero. Of the in ...
Name
... 43. Where are the noble gases located on the periodic table? ______________________How many electrons do they have in their outer shell? __________Can they easily form bonds with other elements? ________ Why or why not?________________________________________________________________________ 44. Exp ...
... 43. Where are the noble gases located on the periodic table? ______________________How many electrons do they have in their outer shell? __________Can they easily form bonds with other elements? ________ Why or why not?________________________________________________________________________ 44. Exp ...
Quantum (wave) mechanics
... The Rutherford-Bohr model of the atom described the electron orbiting around the nucleus in circular orbits. This is a planetary model like the planets orbiting the Sun. However, in terms of Quantum Mechanics the electron has to be regarded as a wave so that experimental observations agree with theo ...
... The Rutherford-Bohr model of the atom described the electron orbiting around the nucleus in circular orbits. This is a planetary model like the planets orbiting the Sun. However, in terms of Quantum Mechanics the electron has to be regarded as a wave so that experimental observations agree with theo ...
Electron configuration
In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s2 2s2 2p6.Electronic configurations describe electrons as each moving independently in an orbital, in an average field created by all other orbitals. Mathematically, configurations are described by Slater determinants or configuration state functions.According to the laws of quantum mechanics, for systems with only one electron, an energy is associated with each electron configuration and, upon certain conditions, electrons are able to move from one configuration to another by the emission or absorption of a quantum of energy, in the form of a photon.Knowledge of the electron configuration of different atoms is useful in understanding the structure of the periodic table of elements. The concept is also useful for describing the chemical bonds that hold atoms together. In bulk materials, this same idea helps explain the peculiar properties of lasers and semiconductors.