Towards Quantum Mechanical Model Of An Atom
Chapter Name : Structure Of Atom |
Sub Topic Code : 102_11_02_05_02 |
Topic Name : Towards Quantum Mechanical Model Of An Atom |
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Sub Topic Name : Heisenberg's Uncertainty Principle |
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Introduction
According to
Heisenberg the product of uncertainty of momentum and uncertainty of position of
an electron in atomic orbital should be greater than a constant value.
Pre-Requisites:
Momentum and Path of
electron, Knowledge about energy of electron.
Activity:
You can estimate the
velocity and momentum of a moving car but not of an electron
Real Life Question:
What principle did
Heisenberg give?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Momentum | Product of velocity and mass of a particle. |
| Atomic Orbital | Atomic orbitals are regions of space around the nucleus of an atom where an electron is likely to be found. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| A moving car | It is difficult to estimate the velocity and momentum of an electron unlike a moving car |
Real life uses :
On heating the
velocity and momentum of electrons changes drastically
Places to visit :
Garage
Practical examples around us
| Examples | Explainations |
|---|---|
| Heating | On heating a liquid, the momentum and velocity of the particles increases causing collisions and therefore heating |
What you learn in Theory:
We can’t estimate
both exact velocity and exact momentum of an electron at same time.
What you learn in Practice:
The velocity and
momentum of an electron cannot be estimated