September 2018 2 347 Report
Tentukan golongan dan periode unsur - unsur berikut.
a. 35 17Cl
b. 12 6 C
c. A : 1s2 2s2 2p6 3s2 3p6 4s2 3d5
d. B : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
e. C : 1s2 2s2 2p6 3s2 3p6

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