Term Symbol of np3 & np2: What Are They?

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SUMMARY

The term symbol for the np3 electron configuration is identified as 4S, attributed to the total orbital angular momentum quantum number L being 0, derived from the values of l being -1, 0, and 1. In contrast, the np2 configuration does not possess a term symbol of 3S, as it only includes l values of -1 and 1. This indicates a misunderstanding of the term symbols associated with these configurations, which are crucial for understanding atomic structure and electron arrangements.

PREREQUISITES
  • Understanding of quantum numbers and their significance in atomic structure
  • Familiarity with electron configurations and term symbols
  • Knowledge of the Pauli Exclusion Principle
  • Basic concepts of angular momentum in quantum mechanics
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  • Research the derivation of term symbols in atomic physics
  • Study the implications of the Pauli Exclusion Principle on electron configurations
  • Explore the concept of total angular momentum in quantum mechanics
  • Examine the differences between singlet and triplet states in electron configurations
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Students of quantum mechanics, physicists, and chemists interested in atomic structure and electron configurations will benefit from this discussion.

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For np3, there is a term symbol: 4S
I think it is because l are -1,0 and 1
So, L value=-1+0+1=0

However, for np2 , there is not a term symbol: 3S (I assume l are -1 and 1)

I know I misunderstand something, but what are they?
 
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http://www.chem.utah.edu/faculty/morse/Courses_files/Atomic%20Term%20Symbols.pdf
 
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