If Aufbau rule is not followed, K-19 will be placed in ....... block

Question

If Aufbau rule is not followed, K-19 will be placed in ....... block (A) s (B) p (C) d (D) f

Tardigrade Admin · Accepted Answer

E.C. of K=19 in the absence of Aufbau rule is 1 s2 2 s2 2 p6 3 s2 3 p6 underset uparrow3 d1 Last-filling electron goes into d-orbital Thus, d-block element

Q. If Aufbau rule is not followed, $K - 19$ will be placed in ....... block

$s$

$p$

$d$

$f$

E.C. of $K = 19$ in the absence of Aufbau rule is
$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} ↑ 3 d^{1}$
Last-filling electron goes into $d$ -orbital
Thus, $d$ -block element

Q. If Aufbau rule is not followed, K−19 will be placed in ....... block

s

p

d

f

E.C. of K=19 in the absence of Aufbau rule is 1s22s22p63s23p6↑3d1​ Last-filling electron goes into d-orbital Thus, d-block element

Q. If Aufbau rule is not followed, $K - 19$ will be placed in ....... block

$s$

$p$

$d$

$f$

E.C. of $K = 19$ in the absence of Aufbau rule is
$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} ↑ 3 d^{1}$
Last-filling electron goes into $d$ -orbital
Thus, $d$ -block element