Question

In the sixth period, the orbitals that are filled are

• A. $6s,5f,6d,6p$
• B. $6s,6p,6d,6f$
• C. $6s,5d,5f,6p$
• D. $6s,4f,5d,6p$

Answer 1

Answer: (D)

As per $(n+\ell )$ rule in $6^{\text{th }}$ period, order of orbitals filling is $6s,4f,5d,6p$