Question

a) Write the significance of quantum numbers n, l & m.
b) State Pauli’s exclusion principle.
c) Write the electronic configuration of copper (Z = 29).

Answer 1

Answer:

The Pauli Exclusion Principle states that, in an atom or molecule, no two electrons can have the same four electronic quantum numbers. As an orbital can contain a maximum of only two electrons, the two electrons must have opposing spins. This means if one electron is assigned as a spin up (+1/2) electron, the other electron must be spin-down (-1/2) electron.

Electrons in the same orbital have the same first three quantum numbers, e.g., n=1 , l=0 , ml=0 for the 1s subshell. Only two electrons can have these numbers, so that their spin moments must be either ms=−1/2 or ms=+1/2 . If the 1s orbital contains only one electron, we have one ms value and the electron configuration is written as 1s1 (corresponding to hydrogen). If it is fully occupied, we have two ms values, and the electron configuration is 1s2 (corresponding to helium). Visually these two cases can be represented as

Answer 2

1 according to topper Quantum numbers are important because they can be used to determine the electron configuration of an atom and the probable location of the atoms electrons

Explanation:

2 pauli's exclusion principle states that no two electrons in the same atom can have identical values for all four of the quantum numbers

3. the atomic number of Goa is 29 its electronic configuration is 3G 101