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Quantum Model of the Atom

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Presentation on theme: "Quantum Model of the Atom"— Presentation transcript:

1 Quantum Model of the Atom
Ch. 4 - Electrons in Atoms Quantum Model of the Atom

2 A. Electrons as Waves Louis de Broglie (1924)
Applied wave-particle theory to e- e- exhibit wave properties QUANTIZED WAVELENGTHS

3 A. Electrons as Waves QUANTIZED WAVELENGTHS

4 A. Electrons as Waves EVIDENCE: DIFFRACTION PATTERNS VISIBLE LIGHT

5 B. Quantum Mechanics Heisenberg Uncertainty Principle
Impossible to know both the velocity and position of an electron at the same time

6 B. Quantum Mechanics Schrödinger Wave Equation (1926)
finite # of solutions  quantized energy levels defines probability of finding an e-

7 Radial Distribution Curve
B. Quantum Mechanics Orbital (“electron cloud”) Region in space where there is 90% probability of finding an e- Orbital Radial Distribution Curve

8 B. Quantum Mechanics Four Types of Orbitals: f d s p

9 C. Quantum Numbers 2s 2px 2py 2pz
Orbitals combine to form a spherical shape. 2s 2pz 2py 2px

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