Question

Define define pauli's exclusion principle and give its one use.??​

Answer 1

Answer:

Pauli's exclusion principle states that an orbital can have a maximum of two electrons having opposite spins.

it is used to calculate the maximum number of electrons with which can be present in an orbital .subshell and an orbit.

Answer 2

Answer:

Pauli's exclusion principle  :  

According to this principle an orbital can have maximum two

electron and of opposite spin .  

Mean orbital can have 0 , 1 or 2 electron . If they are two then

must be with opposite spin.

For example :  

Li and B

Li :  

Electronic configuration :  

Li - 1 s² , 2 s²

In order to fill orbitals :

First have to fill 1 s orbital with opposite spin then 2 s orbital for 1 electron.

B

Electronic configuration :  

B = 1 s² , 2 s², 2 p¹

In order to fill orbitals :

First have to fill 1 s orbital with opposite and also 2 s orbital :

For 2 p orbital just fill 1 electron .