The filling of which orbital is represented by the transition metals in period 4

Explanation:

Transition metals are defined as the metals that have incompletely filled d-orbital in their ground state or stable oxidation state.

General electronic configuration of transition metals is .

The transition elements which are present in period 4 are scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper and zinc.

Thus, we can conclude that the filling of d-orbital is represented by the transition metals in period 4.

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

the answer is:  

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