Question

If n = 6, the correct sequence for filling of electrons will be

• A. $ns \rightarrow \left(n - 2\right) \, f \rightarrow \left(n - 1\right) \, d \rightarrow np$
• B. $ns \rightarrow \left(n - 1\right) \, d \rightarrow \left(n - 2\right) \, f \rightarrow np$
• C. $ns \rightarrow \left(n - 2\right) \, f \rightarrow np \rightarrow \left(n - 1\right)d$
• D. $ns \rightarrow np \, \left(n - 1\right) \, d \rightarrow \left(n - 2\right) \, f$

Answer 1

Answer: (A)

If n = 6, the correct sequence for filling of electrons will be $ns \rightarrow \left(n - 2\right) \, f \rightarrow \left(n - 1\right) \, d \rightarrow np \, \left[n = 6\right]$ .
During filling of electrons Hund's rule, Aufbau principle and Pauli's Exclusion principle must be followed.