General electronic configuration of the d and f block elements

[Kaushik]

Is it $(n-1)d^{1->10}ns^2 \ or \ (n-1)d^{1->10}ns^{0->2}$ ? My textbook says it is the latter. But I feel like it should be the former. Moreover, period 6 and 7 has the presence of f-orbitals. So adding$(n-2)f^{0->14}$ would make it more general. Isn't it?

And also what about the f-block elements? Is it $(n-2)f^{1->14}ns^2 \ or \ (n-2)f^{1->14}(n-1)d^{0->1}ns^2$ ? I feel like it should be the former as the electrons are being added to (n-2) f before (n-1) d. I doubt the second one is correct unless there are any exceptions. But it is just my perception.
Please correct me if I am wrong :)

 

[mitochan]

https://en.wikipedia.org/wiki/Electron_configuration#Atoms:_Aufbau_principle_and_Madelung_rule
tells you exceptions from so called Madelung rule.