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Like, do I need to just remember that it is less in 3d than 3s and so on?

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closed as off-topic by Tyberius, Zhe, Mithoron, Buttonwood, Karsten Theis Jun 12 at 20:42

  • This question does not appear to be about chemistry within the scope defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ Welcome to ChemSE. Please add some further details to your question which, at present, is very broad (Cf. en.wikipedia.org/wiki/…). $\endgroup$ – Buttonwood Jun 12 at 20:37
  • $\begingroup$ I'm voting to close this question as off-topic because your question lacks context. This question needs revision before it is ready for a great answer. Please edit to include how this question came up and how you tried to answer it. This will help writing an answer that is useful for you and for others. $\endgroup$ – Karsten Theis Jun 12 at 20:42