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Scientists 10-10

Scientists 10-10 - • Bohr o Atomic orbitals Electrons...

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Thompson o Cathode Ray Tubes o Discovery of electrons Apply charge between electrons Charged electrons hit cathode, deflect Plum pudding model Mass to charge ratio: c/m e Rutherford o Gold Foil Experiment Shoot beta particles at gold sheet Few bounced back, rest went through Must have been densely positively charged nucleus Planetary model Planck o UV Catastrophe E: hv Radiation occurs in a quanta, packets of energy Radiation occurs only if oscillation acquires energy needed to begin at oscillating frequency Einstein o Photoelectric Effect Ejection of electrons from metal under UV radiation Photons can only be of discrete energies Wave Particle Duality ½ m e v^2 = hv~ - 0 E k / Energy from photon / Energy required to eject photon
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Unformatted text preview: • Bohr o Atomic orbitals Electrons orbit around nucleus Works for H • DeBroglie o Matter wave o Lamba = h/mv o Theorizes that it’s possible to diffract electrons • Heisenberg Uncertainty Principle o Delta X delta P > h/2 = k/4pi o Both position and momentum cannot be determined without precision • Pauli’s Exclusion o Max 2 electrons per orbital • Hund’s rule o Electrons with parallel spins in separate orbital before spinning • Born Interpretation o Probability of finding a particle in a region is proportional to Y^2 and probability density • Shroedinger o Particle in a Box Quantized energy, can’t have 0 energy Zeropoint energy is n=1...
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