Answer: Check explanation.
Step-by-step explanation:
Transition metals are metallic elements that can be found in the Groups IVB–VIII, IB, and IIB on the periodic chart.
The question require us to write down the GROUND state electronic configuration of the first fifth transition metal, sixth transition metal, seventh transition metal element and the eighth transition metal.
NOTE: we are Starting from Argon, which has 18 electrons.
The fifth transition metal is Manganese,Mn. Manganese has 25 electrons, that is, 25- 18= 7. Therefore, it needs seven electrons to complete the configuration.
Hence, The ground state electronic configuration = [Ar)] 3d5. 4s2.
The first sixth Transition metal is iron,Fe. Iron has 26 electrons, that is, 26 - 18 = 8. Therefore, it need eight Electrons to complete the ground state electronic configuration.
Hence, the ground state electronic configuration of Fe= [Ar] 3d6. 4s2.
The first seventh transition metal is Cobalt, Co. It has 27 Electrons, therefore, 27- 18 = 9. Therefore, it needs 9 Electrons to complete its ground state electronic configuration.
Ground state electronic configuration of Co= [Ar] 3d7. 4s2.
The first eight Transition metal is Nickel. It has 28 electrons. Therefore, 28-18= 10. So, it needs 10 Electrons to complete its ground state electronic configuration.
Hence, the Ground state electronic configuration of Ni= [Ar] 3d8. 4s2.