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Which of these periods contain elements with electrons in s, p, d, and f orbitals?
A. periods 1–3
B. periods 1-4
C. periods 3-5
D. periods 6-7

Respuesta :

I think the answer is D. Periods 6-7, Because the periods that would contain elements with electrons in s, p, d, and f orbitals are periods 6-7. 

(I hope this helps you a lot! :) Have a nice day!)

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