For s-orbital, l=0 For d-orbital, l=2 For f-orbital, l=3 For, f-orbital m1 values can be −3,−2,−1,0+1,+2,+3 So, 4f can have ml=−2 Each orbital with ml=−2 can hold 2 electrons. Orbitals that can have ml=−2 are 3d,4f and 6d Total electron =2+2+2=6
