Bohr`s model of the atom
... •Used Einstein’s concept of a photon to define the frequency of radiation emitted when an electron jumps from one state to another. The photon energy is just the energy difference between states, i.e., E f Ei hv •Used classical mechanics to calculate the orbit of the electron. ...
... •Used Einstein’s concept of a photon to define the frequency of radiation emitted when an electron jumps from one state to another. The photon energy is just the energy difference between states, i.e., E f Ei hv •Used classical mechanics to calculate the orbit of the electron. ...
File
... • If it radiated energy, that means that the electron is falling to a level closer to the nucleus. ...
... • If it radiated energy, that means that the electron is falling to a level closer to the nucleus. ...
Quiz 3-6 fy13 - Nuclear Chemistry practice
... _____ 10. A piece of wood found in an ancient burial mound contains only half as much carbon-14 as a piece of wood cut from a living tree growing nearby. If the half-life (t1/2) for carbon-14 is 5730 years, what is the approximate age of the ancient wood? A. 730 years B. 1460 years C. 2856 years D. ...
... _____ 10. A piece of wood found in an ancient burial mound contains only half as much carbon-14 as a piece of wood cut from a living tree growing nearby. If the half-life (t1/2) for carbon-14 is 5730 years, what is the approximate age of the ancient wood? A. 730 years B. 1460 years C. 2856 years D. ...
Thursday, 1/29/09 - Liberty Union High School District
... •Max Planck-hot objects emit energy not as waves, but in packets called “quanta” •“quantum”-minimum energy that can be gained or lost by an atom •E = h •E = energy •h = Planck’s constant (6.626 x 10-34 Js) • = frequency (in s-1) ...
... •Max Planck-hot objects emit energy not as waves, but in packets called “quanta” •“quantum”-minimum energy that can be gained or lost by an atom •E = h •E = energy •h = Planck’s constant (6.626 x 10-34 Js) • = frequency (in s-1) ...
General concepts of radiation
... The velocity of all kinds of EMR is constant at 3 x 1010 cm/s in vacuum (equal to that of light). However, in medium transparent to EMR, the velocity is slightly lesser. EMR as a particle When interacting with matter, behaviour such as the photoelectric effect (To be discussed later) clearly charact ...
... The velocity of all kinds of EMR is constant at 3 x 1010 cm/s in vacuum (equal to that of light). However, in medium transparent to EMR, the velocity is slightly lesser. EMR as a particle When interacting with matter, behaviour such as the photoelectric effect (To be discussed later) clearly charact ...
Bohr Model and Quantum Model
... RULE 1: Electrons can orbit only at certain allowed distances from the nucleus. RULE 2: Atoms radiate energy when an electron jumps from a higher-energy orbit to a lower-energy orbit. Also, an atom absorbs energy when an electron gets boosted from a low-energy orbit to a highenergy orbit. ...
... RULE 1: Electrons can orbit only at certain allowed distances from the nucleus. RULE 2: Atoms radiate energy when an electron jumps from a higher-energy orbit to a lower-energy orbit. Also, an atom absorbs energy when an electron gets boosted from a low-energy orbit to a highenergy orbit. ...
Moles Practice Test
... 1. 16.0 g/mol 2. 164.1 g/mol 3. 71.8 g/mol 4. 1.05 moles 5. 40.g 6a. 6.56 x 1024 molecules 6b. 3.94 x 1025 atoms O 7. 234g 8. 2.73 x 1024 9. 58.5% oxygen 10. No 11. 469g 12. CO 13. FeCl3 14. C4H8O8 15. empirical = Fe2O3 name = iron(III) oxide 70% Fe, 30% O 16. C8H10N4O2 ...
... 1. 16.0 g/mol 2. 164.1 g/mol 3. 71.8 g/mol 4. 1.05 moles 5. 40.g 6a. 6.56 x 1024 molecules 6b. 3.94 x 1025 atoms O 7. 234g 8. 2.73 x 1024 9. 58.5% oxygen 10. No 11. 469g 12. CO 13. FeCl3 14. C4H8O8 15. empirical = Fe2O3 name = iron(III) oxide 70% Fe, 30% O 16. C8H10N4O2 ...
Homework for the electron microscopy class
... Homework 1 for the electron microscopy class The wavelength of photons is given by the expression =hc/E = 12396 eV- /E where h is Planck’s constant and c is the speed of light (in the medium). For electrons, the equivalent expression is = h/p where p is the electron momentum: p = mv. In classica ...
... Homework 1 for the electron microscopy class The wavelength of photons is given by the expression =hc/E = 12396 eV- /E where h is Planck’s constant and c is the speed of light (in the medium). For electrons, the equivalent expression is = h/p where p is the electron momentum: p = mv. In classica ...
General Chemistry - Review for final exam: (Make sure you bring
... g. multiply the following: 3.1 x 103, 2.0 x 10-2, 1.5x10-5 16. In a measurement what is the estimated digit? 17. List the metric measurements mega – micro, include their magnitude. 18. What are the SI units for mass, length, quantity, time. 19. What is weight? 20. How is Celsius converted to Kelvin? ...
... g. multiply the following: 3.1 x 103, 2.0 x 10-2, 1.5x10-5 16. In a measurement what is the estimated digit? 17. List the metric measurements mega – micro, include their magnitude. 18. What are the SI units for mass, length, quantity, time. 19. What is weight? 20. How is Celsius converted to Kelvin? ...
Electrons in Atoms - Brunswick City Schools / Homepage
... • Model did not show how electrons occupy space around nucleus. • Did not answer why electrons are not pulled into atom’s “+” charged nucleus. ...
... • Model did not show how electrons occupy space around nucleus. • Did not answer why electrons are not pulled into atom’s “+” charged nucleus. ...
The end
... incident direction of the photon. The electron scatters at an angle from the incident direction of the h photon and has the Compton wavelength e . Knowing that in the collision, energy and me c momentum are conserved, demonstrate that we have: ' e 1 cos . b/ In a Compton collisio ...
... incident direction of the photon. The electron scatters at an angle from the incident direction of the h photon and has the Compton wavelength e . Knowing that in the collision, energy and me c momentum are conserved, demonstrate that we have: ' e 1 cos . b/ In a Compton collisio ...
Lec-22_Strachan
... Electrons collected at C and passing through the ammeter create a current in the circuit C is maintained at a positive potential by the power supply No electrons are emitted if the incident light frequency is below some cutoff frequency that is characteristic of the material being illuminated ...
... Electrons collected at C and passing through the ammeter create a current in the circuit C is maintained at a positive potential by the power supply No electrons are emitted if the incident light frequency is below some cutoff frequency that is characteristic of the material being illuminated ...
Midterm Review File
... 19. Answer the following questions about the periodic table. a. Explain why noble gases are inert and do not form ions. b. Identify the name of the group that contains the element fluorine _______________ c. Give the name of the element in the alkali group that has the greatest electron affinity ___ ...
... 19. Answer the following questions about the periodic table. a. Explain why noble gases are inert and do not form ions. b. Identify the name of the group that contains the element fluorine _______________ c. Give the name of the element in the alkali group that has the greatest electron affinity ___ ...
CHM121 Exam I Review
... Be able to define the following terms: states of matter, element, compound, ionic vs. molecular compounds, atom, atomic symbol, nucleus, electron, proton, atomic number, neutron, mass number, nuclide, isotopes, atomic weight, metal, nonmetal, metalloid, ion, cation, anion, chemical reaction, reactan ...
... Be able to define the following terms: states of matter, element, compound, ionic vs. molecular compounds, atom, atomic symbol, nucleus, electron, proton, atomic number, neutron, mass number, nuclide, isotopes, atomic weight, metal, nonmetal, metalloid, ion, cation, anion, chemical reaction, reactan ...
Physics IV - Exam - Winter 2007/08 Please note:
... • Please WRITE YOUR NAME BELOW. This sheet will be stapled to your answers at the end of the exam. • Please put your name on all of your answer sheets. • Throughout the exam the exam overseers are available to answer your questions, do not hesitate to ask for clarification if needed. ...
... • Please WRITE YOUR NAME BELOW. This sheet will be stapled to your answers at the end of the exam. • Please put your name on all of your answer sheets. • Throughout the exam the exam overseers are available to answer your questions, do not hesitate to ask for clarification if needed. ...
Lecture 24: Quantum mechanics
... orbit of radius r. However, to maintain an orbit we must balance centrifugal force, which can be due to Columbic interaction. Equating the centripetal force with coulombs ...
... orbit of radius r. However, to maintain an orbit we must balance centrifugal force, which can be due to Columbic interaction. Equating the centripetal force with coulombs ...
Rutherford–Bohr model
... The Rutherford–Bohr model of the hydrogen atom (Z = 1) or a hydrogen-like ion (Z > 1), where the negatively charged electron confined to an atomic shell encircles a small, positively charged atomic nucleus and where an electron jump between orbits is accompanied by an emitted or absorbed amount of ...
... The Rutherford–Bohr model of the hydrogen atom (Z = 1) or a hydrogen-like ion (Z > 1), where the negatively charged electron confined to an atomic shell encircles a small, positively charged atomic nucleus and where an electron jump between orbits is accompanied by an emitted or absorbed amount of ...
Bremsstrahlung
Bremsstrahlung (German pronunciation: [ˈbʁɛmsˌʃtʁaːlʊŋ], from bremsen ""to brake"" and Strahlung ""radiation"", i.e. ""braking radiation"" or ""deceleration radiation"") is electromagnetic radiation produced by the deceleration of a charged particle when deflected by another charged particle, typically an electron by an atomic nucleus. The moving particle loses kinetic energy, which is converted into a photon, thus satisfying the law of conservation of energy. The term is also used to refer to the process of producing the radiation. Bremsstrahlung has a continuous spectrum, which becomes more intense and whose peak intensity shifts toward higher frequencies as the change of the energy of the accelerated particles increases.Strictly speaking, braking radiation is any radiation due to the acceleration of a charged particle, which includes synchrotron radiation, cyclotron radiation, and the emission of electrons and positrons during beta decay. However, the term is frequently used in the more narrow sense of radiation from electrons (from whatever source) slowing in matter.Bremsstrahlung emitted from plasma is sometimes referred to as free/free radiation. This refers to the fact that the radiation in this case is created by charged particles that are free both before and after the deflection (acceleration) that caused the emission.