Scrodinger-Heisenberg-quantum-mechanical-model.pptx

Quantum mechanical model

1. Scrodinger & Heisenberg quantum mechanical model

2. Quantum mechanical model state that: Electrons are NOT in circular orbit nucleus. Electrons are in 3-D region around the nucleus called atomic orbitals . The atomic orbital describes the probable location of the electron .

3. Where does this model come from? A quick history. Louis de Broglie: Electrons behave with wave and particle properties at the same time.

4. Werner Heisenberg(1927): It is impossible to know both the position and velocity of an electron simultaneously. Developed matrix mechanics, which described quantum systems in terms of probability rather than certainty. Heisenberg Uncertainty Principle

5. Erwin Schrodinger(1926): Refined the wave-particle theory proposed by de Broglie. Developed an equation that treated an electron like a wave and predicted the probable location of an electron around the nucleus called the atomic orbital. Scrodinger’s equation:

6. The Quantum Mechanical Mode l The quantum model determines the allowed energies an electron can have and how likely it is to find the electron in various locations around the nucleus.

7. The Quantum Mechanical Model The probability of finding an electron within a certain volume of space surrounding the nucleus can be represented as a fuzzy cloud. - The cloud is more dense where the probability of finding the electron 2 is high.

8. Why it is Essential? More accurate than Bohr’s model Explain complex atoms, not just hydrogen Matches experimental results Basis for modern chemistry and physics

9. ATOMIC ORBITALS