PPT-The Atom Lab # 2 The Bohr Model

Whats Inside an Atom An atom is made up of a team of three players protons neutrons and electrons They each have a charge mass and a location Protons Neutrons collectively called nucleons. 125 1 In order to explain the results of experiments on scattering of rays by matter Prof Rutherford has given a theory of the structure of atoms According to this theory the atoms consist of a positively charged nucleus surrounded by a system of el Bohr Model diagrams are used to represent the electron structures of elements. Protons and neutrons are placed in the middle to represent the nucleus. Electrons are placed in the electron shells. Making a Bohr Model. (around 400 BCE). Democritus thought matter could be divided into. . smaller and smaller pieces until a . single indivisible . particle is reached. . He named this particle the . atom. He proposed that atoms are of different sizes, in constant motion, and separated by empty spaces.. With thanks to Isaac Asimov. As easy as LMN. No one knows where the Latin word “elementum” comes from. We get our word ELEMENT from it.. Some think maybe the Romans had an expression that something was as simple as “L-M-N,” just as we say something is as easy as “A-B-C.”. Advanced Chemistry. Ms. Grobsky. Shortcomings of the Bohr Model. Bohr’s model was too simple. Worked . well with only hydrogen because H only has one . electron. C. ould . only approximate spectra of other elements with more than one . C. l. ). Draw the Bohr model. Draw the orbital Diagram. Write the longhand notation. Write the shorthand notation. Bellringer. Bellringer. Bohr Model. Longhand. 1s. 2. 2s. 2. 2p. 6. 3s. 2. 3p. 5. Contents:. Problems in nucleus land. Spectral lines and Rydberg’s formula. Photon wavelengths from transition energies. Electron in a box. Schr. ö. dinger. Limitations of Bohr’s model. .  .                               . Review for Quiz. Match the Atomic Model to the Person who designed the model.. Use the Models Above . Niels. Bohr. John Dalton. Ernst Rutherford. J.J. Thomson. Niels. Bohr - D. John Dalton - A. Ernst Rutherford - C. Standing waves. Quantum energy . of colors . Bohr Model . (particle picture). Assumptions. Nuclear model. Discrete electron orbits n = 1,2,3,... Light absorbed/emitted as quantum. . of energy when electron jumps orbit. Five Experiments You Should Know. J. J. Thomson’s Cathode Ray. English physicist J. J. Thomson studied electrical discharges in partially evacuated tubes called . cathode-ray tubes. . He found that when high voltage was applied to the tube, a “ray” he called a . Two regions. Nucleus . protons and neutrons. Electron . cloud. region where you might find an electron. Modern View. . . . . . . .. Dalton (1803). Thomson (1904). (positive and negative charges). Kelebihan. . Niels. Bohr. Kekurangan. . Niels. Bohr. KELUAR. Gambar. . Niels. Bohr . dan. Model Atom . Niels. Bohr. . Teori. Atom . Niels. Bohr. Kelompok. 3 :. Wahyu. . Trifandi. . Octa. Quiz. Stability of atoms. Ultraviolet catastrophe. Bohr Model . bootcamp. PHYS274 Midterm I and related announcements. Midterm I on . Oct 16. th. , Monday. Professor . Pui. Lam will substitute for me, Oct 6-18, while I am away at KEK. Known as the “Laughing Philosopher”. “Nothing exists except atoms and empty space; everything else is opinion.”. Created term “. atomos. ” which literally means “not cut” or indivisible.