Quantum Mechanical Model Of Atom
Chapter Name : Structure Of Atom |
Sub Topic Code : 102_11_02_06_04 |
Topic Name : Quantum Mechanical Model Of Atom |
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Sub Topic Name : Energies Of Orbitals |
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Introduction
• A net energy of interaction (-ve sign) exists in an atom due to an attractive force b/w the electrons and the nucleus and a repulsive force b/w the electrons. • For a single electron system, energy of an electron is determined by the principal quantum number only. • For a multi-electron system, energy of an electron is determined by both the principal quantum number and the azimuthal quantum number. • The energy interactions in an atom depend upon the size and shape of the atomic orbitals.
Pre-Requisites:
• Atomic orbitals • Quantum numbers
Real Life Question:
Why do electrons not fall out of the atom?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
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| Atomic Orbital | The wave function of an electron in an atom or molecule, indicating the electron's probable location. |
| Principle quantum number | It tells us the number of the electron's shell. |
| Azimuthal quantum number | It determines the shape of an atomic orbital. |
| Attractive force | The interactive force b/w the nucleus and the electrons. |
| Repulsive force | The interactive force b/w different electrons in an atom. |
| Degenerate orbitals | Orbitals which have the same value of energy. |
Learning aids / Gadgets
| Gadgets | How it can be used |
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Practical examples around us
| Examples | Explainations |
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What you learn in Theory:
The energy of electrons in a single and multi electron system.