Explain Pauli exclusion with examples
Answers
Answer:
We can take a neutral helium atom as a common Pauli Exclusion Principle example. The atom has 2 bound electrons and they occupy the outermost shell with opposite spins. Here, we will find that the two electrons are in the 1s subshell where n = 1, l = 0, and ml = 0. Their spin moments will also be different.
Explanation:
Answer:
We can take a neutral helium atom as a common Pauli Exclusion Principle example. The atom has 2 bound electrons and they occupy the outermost shell with opposite spins. Here, we will find that the two electrons are in the 1s subshell where n = 1, l = 0, and ml = 0.
Their spin moments will also be different. One will be ms = -1/2 and the other will be +1/2. If we draw a diagram then the subshell of the helium atom will be represented with 1 “up” electron and 1 “down” electron. In essence, 1s subshell will consist of two electrons, which have opposite spins.
Similarly, if we take Hydrogen it will have 1s subshell with 1 “up” electron (1s1). Lithium will have the helium core (1s2) and then one more “up” electron ( 2s1). What we are trying to depict here is that the electron configuration of the orbitals is written in this manner.
Pauli Exclusion Principle
Formulation of the Pauli Exclusion Principle
From the above example, we can further deduce that successive larger elements will have shells of successively higher energy. The number of electrons in the outermost shell is also directly related to the different chemical properties that elements possess. Elements with the same number of electrons in the outermost shell will have similar properties.
