How many unpaired electrons ae in a `Fe^(2+)` ion in the ground state?

For the transition metal with the electron configuration 1s^(2)2s^(2)2p^(6)4s^(2)3d^(6) ,How many unpaired electrons are present in tis +2 ion in the ground state ?

How many unpaired electrons are there in Ni^(2+) ion ?

No. of unpaired electrons in Fe^(2+) ions is :

How many unpaired electrons are there in Ni^(2+) ?

How many unpaired electrons are there in Ni^(2+) ?

How many unpaired electrons are there is Ni^(2+)

How many unpaired electrons are present in the ground state of (i) P(Z = 15) (ii) Fe^(2+) (Z = 26) (iii) Cl^(-)(Z = 17) ?