ParT 2- Electronic Structure and the Periodic Table Reference: Chapter 7-8 in textbook
1 PART 2 – Electronic Structure and the Periodic Table Reference: Chapter 7—8 in textbook
Early Atomic Models 酷 earnIn EARLY ATOMIC MODELS
2 Early Atomic Models
Thomson 's 1 904 model of the atom Plumb Pudding Model He discovered the electron a discovery for which he was awarded the nobel Prize in physics in 1906 electrons Scanned at the American Institute of Physics cathode anode deflection towards 十 positively C positive plate charged deflecting i negative charge plates pudding any metal works 3
Thomson’s 1904 Model of the Atom Plumb Pudding Model 3 He discovered the electron, a discovery for which he was awarded the Nobel Prize in physics in 1906
Ernest rutherford atom Ernest rutherford is considered the father of nuclear physics Particles named and characterized by him include the a particle, B particle and proton. Rutherford overturned Thomson 's atom model in 1911 with his well-known gold foil experiment in which he demonstrated that the atom has a tiny, massive nucleus Rutherford Atom elementary particles ● proton(+) helium atom nucleus where the mass of the electron is 1/2000 the mass of the proton and the mass of the proton electron orbits equals the mass of the neutron 4
Ernest Rutherford Atom Ernest Rutherford is considered the father of nuclear physics. Particles named and characterized by him include the α particle, β particle and proton. Rutherford overturned Thomson's atom model in 1911 with his well-known gold foil experiment in which he demonstrated that the atom has a tiny, massive nucleus. 4
Experiment to Discover Atom Structure a-particle mass number 4 Nucleus and electron model
Experiment to Discover Atom Structure 5 Nucleus and Electron Model -particle： He2+ mass number = 4