Pauli Exclusion Principle

Pauli Exclusion Principle

1. is a quantum principle

2. enunciated by Wolfgang Ernst Pauli in 1925

3. two electrons in an atom can not have identical quantum number

   • this would explain the fact that the electrons are dispersed in layers or levels around the nucleus of the atom

4. atoms that have the highest number of electrons occupy more space,because it increases the number of the atom consisting

   • the maximum number of electrons that can have a layer or level is 2n ^ 2

5. only two electrons can be in the same orbital with opposite spin

6. says that

7. may only contain two electrons   one with a positive spin +1/2 and the other with its opposite negative spin -1 / 2.

8. This principle is widely used in physics and chemistry that helps us better understand the quantum world

9. to describe the situation of the electrons in the atom need to use a quantum number plus S, called spin