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24Cr⇒1s2 2s2 2p6 3s2 3p6 4s2 3d4
30Zn⇒1s2 2s2 2p6 3s2 3p6 4s2 3d10
A. 15p = 1s2 2s2 2p6 3s2 3p3
B. 24cr= 1s2 2s2 2p6 3s2 3p6 4s1 3d5
c. 30Zn= 1s2 2s2 2p6 3s2 3p6 4s2 3d10
menurut gas mulia
A. 15p = [Ne] 3s2 3p3
B. 24cr= [Ar] 4s1 3d5
c. 30Zn= [Ar] 4s2 3d10