Find the number of chemical species in which outer shell ' d ' orbital is having more than five electrons.

$\text{ Ac, Cd, Zn, Sn, Cr, Pt, Ag }$

The electronic configuration of Cd is,

$\left[\mathrm{Kr}\right]4{\mathrm{d}}^{10}5{\mathrm{s}}^2$

The electronic configuration of Zn is,

$\left[\mathrm{Ar}\right]3d^{10}4s^2$

The electronic configuration of Pt is,

$\left[Xe\right]4f^{14}5d^{9}6s^1$

The electronic configuration of Ag is,

$\left[\mathrm{Kr}\right]4{\mathrm{d}}^{10}5{\mathrm{s}}^1$