I'm just going through a past paper for an exam im revising for and I cant work out how to solve this question!(adsbygoogle = window.adsbygoogle || []).push({});

it's

" Total spin S, total orbital angular momentum L and total angular moment J are specified according to spectroscopic notation by the term symbol [tex]^{S+1}L_{J}[/tex]

i) For Helium show the the levels 1s2p and 1s3d include the terms [tex]^{1}P_{1}[/tex] and [tex]^{1}D_{2}[/tex]

ii) Determine allowed optical transitions between the [tex] ^{1}P_{1}[/tex] and [tex] ^{1}D_{2}[/tex] levels in the presences of an external magnetic field. How many transitions occur? How many spectral lines will be observed"

Ive got no idea where to start

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Term Symbols

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