November 2018 1 72 Report
Ion X^2+ memiliki konfigurasi elektron 1s^2 2s^2 2p^6. nilai keempat bilangan kuantum elektron valensinya atom X adalah....
a. n=2 l=0 m=0 s=+1/2
b. n=2 l=1 m=+1 s=-1/2
c. n=3 l=0 m=0 s=-1/2
d. n=3 l=1 m=-1 s=+1/2
e. n=3 l=1 m=0 s=+1/2

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