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The concept that matter behaves like a wave was proposed by Louis de Broglie in 1924. It is also referred to as the de Broglie hypothesis. Matter waves are referred to as de Broglie waves. the uncertainty principle is any of a variety of mathematical inequalities asserting a fundamental limit to the precision with which the values for certain pairs of physical quantities of a particle, such as position, x, and momentum, p, can be predicted from initial conditions. In this chapter we will cover:
1. Quantum Mechanical Model of Atom
2. De Broglie Hypothesis
3. Heisenberg’s Uncertainty Principle
4. Example 1(On Heisenberg Principle): A golf ball has a mass of 40g, and a speed of 45ms−1. If the speed can be measured with in accuracy of 2%, calculate the uncertainty in the position.
5. Example 2 (De Broglie Hypothesis): The mass of an electron is 9.1 × 10–31 kg. If its K.E. is 3.0 × 10–25 J, calculate its wavelength.
6. Bohr Model Failure
7. Quantum Mechanical Model of Atom
8. Quantum Mechanics
9. Features of Quantum Mechanical Model of Atom
10. Schrodinger Equation
11. Atomic Orbitals
12. Principal Quantum Number
13. Azimuthal Quantum Number
14. Magnetic Quantum Number
15. Magnetic orbital view
16. Quantum Model
17. Spin Quantum Number
18. Quantum Numbers: Example 1: What is the total number of orbitals associated with the principal quantum number n = 3?
19. Orbits vs. Orbitals

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