This Model was proposed by the scientist Niel Bohr
As per this Model,
-
Electrons move around Nucleus of an atom.
But they move in discrete orbits (specific paths).
These orbits are called energy levels or shells.
Different Energy shells are:-
K shell, L shell, M shell and N shell .
Other Name of These shells are:-
|
Shell Name |
Other Name |
|
K shell |
n=1 |
|
L Shell |
n=2 |
|
M Shell |
n=3 |
|
N Shell |
n=4 |
-
Each energy shells have different amount of electrons and different energy level
- Example; K shell can hold less electrons and has less energy level than the L shell and so on.
|
Shell Name |
n |
Number of Electrons |
Energy Level |
|
K shell |
n = 1 |
2 |
Low Energy Level |
|
L shell |
n = 2 |
8 |
Medium Energy Level |
|
M shell |
n = 3 |
18 |
High Energy Level |
|
N shell |
n = 4 |
32 |
Max Energy Level |
2.Electrons keep on revolving in the same shell.
But they do not radiate energy while revolving in these shells (there is no loss of energy ).
Examples -
In text Question - Page 49 Q3
NCERT Back Exercise - Q5
