Electron Configuration Of Iron In Ground State. The element with that electron configuration. Iron's atomic number is 26.
The 4s orbital is filled so that's all good, but the 3d orbital is still not completely full. Cobalt 0 iron х 5 ? You always take electrons from the s shell first!
Hence strontium ion is present in +3 state, the number of electrons.
There are 118 elements in the periodic table. The element with that electron configuration. The configuration of ions would be fe 3+ fe 3+ 1s 2, 2s 2 2p 6, 3s 2 3p 6 3d 5. Fe = [ar] 4s 2 3d 6 fe 2+ cation = [ar]3d 6 • for this, all transition metals form +2 ions.