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

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

$n s \longrightarrow(n-1) d \longrightarrow(n-2) f \longrightarrow n p$
$n s \longrightarrow(n-2) f \longrightarrow n p \longrightarrow(n-1) d$
$n s \longrightarrow n p \longrightarrow(n-1) d \longrightarrow(n-2) f$
$n s \longrightarrow(n-2) f \longrightarrow(n-1) d \longrightarrow n p$

Solution

$6 s \rightarrow 4 f \rightarrow 5 d \rightarrow 6 p$ for $n=6$

Asked in: NEET 2011 (Screening)

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