Answer
$\therefore\text{Element with atomic number 53 is Iodine (i.e I)}$
Work Step by Step
Krypton (i.e Kr) is having an atomic number of 36.
Also From the electronic configuration given $[Kr]5s^24d^{10}5p^5$ is $\textbf{53}$
$\text{Element with atomic number 53 is Iodine}$
