Structure Of The Atom
Chapter Name : Structure Of The Atom |
Sub Topic Code : 102_09_04_02_03 |
Topic Name : Structure Of The Atom |
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Sub Topic Name : Behr's Model Of An Atom |
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Introduction
· Bohr wanted to explain things which Rutherford's model failed to explain. So he made following postulates :
· (i) Electrons revolve around the nucleus in special orbits of certain radii, these orbits are called discreet orbits of electrons.
· (ii) The special point about these orbits is, in these orbits electrons do not radiate energy.
· Discreet orbits of electrons or shells are called energy levels.
· We name them as K, L, M, N... or by number 1, 2, 3...
· Here K or 1 denotes the innermost orbit
· In 1922 he was awarded the Nobel Prize in Physics and Bohr's son, Aage Bohr, received the 1975 Nobel Prize in physics.
· They became the third father-son duo to have won the Nobel prizes.
Pre-Requisites:
Daltons atomic theory, molecules
Activity:
Atoms are the smallest units of any substance.
Real Life Question:
What does an atom look like?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Atom | Smallest unit of a compound. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Watermelon | Red part of watermelon -> positive charge Seeds -> negative charge |
Real life uses :
Atoms make up all substances.
Places to visit :
Laboratory.
Practical examples around us
| Examples | Explainations |
|---|---|
| Watermelon | Red part of watermelon -> positive charge Seeds -> negative charge |
What you learn in Theory:
· (i) Electrons revolve around the nucleus in special orbits of certain radii, these orbits are called discreet orbits of electrons.
· (ii) The special point about these orbits is, in these orbits electrons do not radiate energy.
What you learn in Practice:
Atoms are the smallest unit of any substance.