Quantum Mechanical Model - Elmwood Park Memorial Middle School
... • These slides are on the webpage if you would like them. ...
... • These slides are on the webpage if you would like them. ...
Quantum Mechanics
... Electrons in an atom • Electrons can form standing waves going around a nucleus • Only some wavelengths fit only certain energy levels ...
... Electrons in an atom • Electrons can form standing waves going around a nucleus • Only some wavelengths fit only certain energy levels ...
Atomic Structure 1. Historical perspective of the model of the atom a
... of the same type of element have the same chemical properties, compounds are formed by two or more different types of atoms, and that a chemical reaction involves either, joining, separating, or rearranging atoms. b.) In 1910, Ernest Rutherford passed alpha particles through gold foil which showed t ...
... of the same type of element have the same chemical properties, compounds are formed by two or more different types of atoms, and that a chemical reaction involves either, joining, separating, or rearranging atoms. b.) In 1910, Ernest Rutherford passed alpha particles through gold foil which showed t ...
The Fine Structure Constant and Electron (g‐2) Factor: Questions
... The third term in the expression for E(n,ms) is the leading relativistic correction to the energy levels, and δ is defined as ...
... The third term in the expression for E(n,ms) is the leading relativistic correction to the energy levels, and δ is defined as ...
Unit 4 Study Guide - Key - Effingham County Schools
... 8. A _quantum______________ is the minimum amount of energy that can be lost or gained by an _atom_________. 9. A _photon_____________ is a particle of electromagnetic radiation having zero mass and carrying a quantum of energy. 10. The _photoelectric______________________ effect refers to the emiss ...
... 8. A _quantum______________ is the minimum amount of energy that can be lost or gained by an _atom_________. 9. A _photon_____________ is a particle of electromagnetic radiation having zero mass and carrying a quantum of energy. 10. The _photoelectric______________________ effect refers to the emiss ...
Physics 30 Concept Check 6 Concept: Calculate the electric
... Determine the amount of potential difference between two parallel plates that are separated by 6.0 cm if the electric field between the plates is determined to be ...
... Determine the amount of potential difference between two parallel plates that are separated by 6.0 cm if the electric field between the plates is determined to be ...
Quantum Model of the Atom Power point
... particles and waves, then where are they in the atom? •Heisenberg’s idea involved the detection of electrons. Electrons are detected by their interaction with photons. Because photons have about the same energy as electrons, any attempt to locate a specific electron with a photon knocks the electron ...
... particles and waves, then where are they in the atom? •Heisenberg’s idea involved the detection of electrons. Electrons are detected by their interaction with photons. Because photons have about the same energy as electrons, any attempt to locate a specific electron with a photon knocks the electron ...
CHEMISTRY 30A CHAPTER 2 NOTES FALL 2014
... formulas for C, S, P, and Br. The Electromagnetic Spectrum In addition to proton, neutron and electron, we should add photon. The photon behaves as a wave rather than a particle and interacts with matter on the quantum level. Waves listed in order of decreasing energy go from gamma rays and X-rays ( ...
... formulas for C, S, P, and Br. The Electromagnetic Spectrum In addition to proton, neutron and electron, we should add photon. The photon behaves as a wave rather than a particle and interacts with matter on the quantum level. Waves listed in order of decreasing energy go from gamma rays and X-rays ( ...
Fundamentals of Atomic Structure
... different elements combine with each other. A given compound always has the same relative numbers and types of atoms. Chemical reactions involve reorganization of the atomschanges in the way they are bound together. The atoms themselves are not changed in a chemical reaction. ...
... different elements combine with each other. A given compound always has the same relative numbers and types of atoms. Chemical reactions involve reorganization of the atomschanges in the way they are bound together. The atoms themselves are not changed in a chemical reaction. ...
Ch. 6 Electric Structure HW
... 5D) According to De Broglie’s Theory, why would an electron show more wave-like properties than a golf ball? 5E) Describe how the wave properties of the electron were demonstrated experimentally after De Broglie’s theory was published. 6) Heisenberg’s Uncertainty Principle: Read your textbook, and g ...
... 5D) According to De Broglie’s Theory, why would an electron show more wave-like properties than a golf ball? 5E) Describe how the wave properties of the electron were demonstrated experimentally after De Broglie’s theory was published. 6) Heisenberg’s Uncertainty Principle: Read your textbook, and g ...
Multi-electron Atoms
... Atoms with Z>1 contain >1 electron. This changes the atomic structure considerably because in addition to the electron-nucleus interaction, there is the repulsive electron-electron interaction. Calculations show that allowed electron energies are no longer solely determined by the single quantum num ...
... Atoms with Z>1 contain >1 electron. This changes the atomic structure considerably because in addition to the electron-nucleus interaction, there is the repulsive electron-electron interaction. Calculations show that allowed electron energies are no longer solely determined by the single quantum num ...
Ch 4 – Atoms: Building Blocks of Matter
... _____________________ ___________________: the entire space that electrons occupy __________________ _________________: the most likely location in an electron cloud in which an electron can be found ...
... _____________________ ___________________: the entire space that electrons occupy __________________ _________________: the most likely location in an electron cloud in which an electron can be found ...
Chemistry – Ch 5 Review Sheet
... C 1. Given a particle of mass m and velocity v, de Broglie’s hypothesis allows you to predict the ___ a. position of the particle c. wavelength of the particle b. diameter of the particle d. charge of the particle B 2. Which of the following is a possible value of electron spin? c. 1 d. -1 ½ a. 0 b. ...
... C 1. Given a particle of mass m and velocity v, de Broglie’s hypothesis allows you to predict the ___ a. position of the particle c. wavelength of the particle b. diameter of the particle d. charge of the particle B 2. Which of the following is a possible value of electron spin? c. 1 d. -1 ½ a. 0 b. ...
Chapter 5 Practice Section 5-1 Discuss the placement (if any) of
... 47. Give the number of orbitals in a. n = 3 ________ b. a 4d sublevel _______ c. an f sublevel _______ 48. Given the following sets of quantum numbers, indicate those that could not occur a. 1, 1, 0, +½ b. 2, 1, 0, +½ c. 2, 0, 1, -½ ...
... 47. Give the number of orbitals in a. n = 3 ________ b. a 4d sublevel _______ c. an f sublevel _______ 48. Given the following sets of quantum numbers, indicate those that could not occur a. 1, 1, 0, +½ b. 2, 1, 0, +½ c. 2, 0, 1, -½ ...
Chemistry – Ch 4 Review Sheet
... C 1. Given a particle of mass m and velocity v, de Broglie’s hypothesis allows you to predict the ___ a. position of the particle c. wavelength of the particle b. diameter of the particle d. charge of the particle B 2. Which of the following is a possible value of electron spin? a. 0 b. +1/2 c. 1 d. ...
... C 1. Given a particle of mass m and velocity v, de Broglie’s hypothesis allows you to predict the ___ a. position of the particle c. wavelength of the particle b. diameter of the particle d. charge of the particle B 2. Which of the following is a possible value of electron spin? a. 0 b. +1/2 c. 1 d. ...
Chemistry – Ch 4 Review Sheet
... d. charge of the particle ___2. Which of the following is a possible value of electron spin? a. 0 b. +1/2 c. 1 d. -1 ½ ___3. Quantum mechanics would be used to predict the behavior of which of the following? a. a collision between a photon and an electron b. a projectile fired from a cannon c. a bal ...
... d. charge of the particle ___2. Which of the following is a possible value of electron spin? a. 0 b. +1/2 c. 1 d. -1 ½ ___3. Quantum mechanics would be used to predict the behavior of which of the following? a. a collision between a photon and an electron b. a projectile fired from a cannon c. a bal ...
Chapter 2 Part 1 ppt
... • 4r2R2: probability of finding electron at a given distance from nucleus, summed over all angles • Probability of finding the electron at a certain distance from the nucleus is not equal to the probability of finding the electron at a certain point at that distance from the nucleus. • There is a w ...
... • 4r2R2: probability of finding electron at a given distance from nucleus, summed over all angles • Probability of finding the electron at a certain distance from the nucleus is not equal to the probability of finding the electron at a certain point at that distance from the nucleus. • There is a w ...
32 The Atom and the Quantum Answers and Solutions for Chapter
... 11. Yes, if there is at least one intermediate energy state that the electron can transition to along the way. 12. The relationship is given by ∆E ~ f. 13. The circumferences of orbits are discrete because they are made up of particular whole-number wavelengths of the electron. 14. In the first orbi ...
... 11. Yes, if there is at least one intermediate energy state that the electron can transition to along the way. 12. The relationship is given by ∆E ~ f. 13. The circumferences of orbits are discrete because they are made up of particular whole-number wavelengths of the electron. 14. In the first orbi ...
Lecture 13
... Impacting electrons cause electrons in core (lowest energy) states to be knocked out. For high Z atoms, these are very tightly bound states (K shells), so require high energies (many keV) to eject them Spectrum shows sharp peaks, due to emission of photons by outer electrons falling to vacated core ...
... Impacting electrons cause electrons in core (lowest energy) states to be knocked out. For high Z atoms, these are very tightly bound states (K shells), so require high energies (many keV) to eject them Spectrum shows sharp peaks, due to emission of photons by outer electrons falling to vacated core ...
Electron
The electron is a subatomic particle, symbol e− or β−, with a negative elementary electric charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure. The electron has a mass that is approximately 1/1836 that of the proton. Quantum mechanical properties of the electron include an intrinsic angular momentum (spin) of a half-integer value in units of ħ, which means that it is a fermion. Being fermions, no two electrons can occupy the same quantum state, in accordance with the Pauli exclusion principle. Like all matter, electrons have properties of both particles and waves, and so can collide with other particles and can be diffracted like light. The wave properties of electrons are easier to observe with experiments than those of other particles like neutrons and protons because electrons have a lower mass and hence a higher De Broglie wavelength for typical energies.Many physical phenomena involve electrons in an essential role, such as electricity, magnetism, and thermal conductivity, and they also participate in gravitational, electromagnetic and weak interactions. An electron generates an electric field surrounding it. An electron moving relative to an observer generates a magnetic field. External magnetic fields deflect an electron. Electrons radiate or absorb energy in the form of photons when accelerated. Laboratory instruments are capable of containing and observing individual electrons as well as electron plasma using electromagnetic fields, whereas dedicated telescopes can detect electron plasma in outer space. Electrons have many applications, including electronics, welding, cathode ray tubes, electron microscopes, radiation therapy, lasers, gaseous ionization detectors and particle accelerators.Interactions involving electrons and other subatomic particles are of interest in fields such as chemistry and nuclear physics. The Coulomb force interaction between positive protons inside atomic nuclei and negative electrons composes atoms. Ionization or changes in the proportions of particles changes the binding energy of the system. The exchange or sharing of the electrons between two or more atoms is the main cause of chemical bonding. British natural philosopher Richard Laming first hypothesized the concept of an indivisible quantity of electric charge to explain the chemical properties of atoms in 1838; Irish physicist George Johnstone Stoney named this charge 'electron' in 1891, and J. J. Thomson and his team of British physicists identified it as a particle in 1897. Electrons can also participate in nuclear reactions, such as nucleosynthesis in stars, where they are known as beta particles. Electrons may be created through beta decay of radioactive isotopes and in high-energy collisions, for instance when cosmic rays enter the atmosphere. The antiparticle of the electron is called the positron; it is identical to the electron except that it carries electrical and other charges of the opposite sign. When an electron collides with a positron, both particles may be totally annihilated, producing gamma ray photons.