Answer:
(1)[tex]\Delta S=0[/tex]
(2)[tex]\Delta L=0, +1,-1[/tex] but [tex]J=0 to J=0[/tex] transition not allowed.
Explanation:
Atoms can be described by the quantum number n, spin quantum number S, angular momentum quantum number L, and total angular momentum quantum number J. Based on approximation Russel- Saunders electron coupling, the atomic term symbol can be written as [tex]L_{J} ^{2S+1}[/tex].
The conditions or selection rule to promoting the electron are discussed below:
(1) The total spin should not change that is [tex]\Delta S=0[/tex].
(2) The total angular momentum change should be, [tex]\Delta L=0, +1,-1[/tex] but [tex]J=0 to J=0[/tex] transition not allowed.
