JEE Main 2015 · 10 Apr · Shift 1 · Chemistry Q33

ChemistrySingle correct+4 / -1Question 33 of 90

If the principal quantum number n = 6, the correct sequence of filling of electrons will be :

ns\to np\to(n-1)d\to(n-2)f

ns\to(n-2)f\to(n-1)d\to np

ns\to(n-1)d\to(n-2)f\to np

ns\to(n-2)f\to np\to(n-1)d

Answer and worked solution

Official answer: B

By the $(n+l)$ rule, for $n=6$ the filling order is $6s\to4f\to5d\to6p$ , i.e. $ns\to(n-2)f\to(n-1)d\to np$ .

JEE Main 2015 · 10 Apr · Shift 1, Chemistry question 33