An element in +2 oxidation state has 24 electrons. The atomic number of the element
and the number of unpaired electrons present in it respectively are
 

Oxidation state = +2 

Electrons = 24 

Atomic number = 24+2 = 26 

electronic configuration for Z= 26 is 

$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^6$

For 3d⁶ the number unpaired electrons are 4.