October 2018 1 559 Report
Diketahui unsur dengan konfigurasi elektron
X= 1s2, 2s2, 2p6, 3s2, 3p3
Y= 1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4s1
Z= 1s2, 2s2, 2p6, 3s2, 3p6, 4s2
Tentukan:
a. nomor atom unsur tsb
b. nilai keempat bilangan kuantum elektron terakhir
c. golongan dan periode unsur dalam sistem periodik


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