Question

A metal ion with a net +3 charge has five electrons in the 3d shell. identify the metal. name of metal iron ruthenium palladium manganese cobalt chemical symbol

Answer 1

Answer is Iron.

Explanation:
                    The atomic number of Iron (Fe) is 26. SO the Electronic configuration is,
 
                         Fe   =   1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d⁶

When Iron looses three electrons its electronic configuration becomes,

                         Fe³⁺   =   1s², 2s², 2p⁶, 3s², 3p⁶, 3d⁵

Result:
          After loosing three electrons the d-shell get 5 electrons (Half-Filled D-Orbital) which is stable, Hence due to this stability Iron tends to attain +3 charge.