January 2019 1 20 Report
23. Urutkan unsure berikut ini berdasarkan ukuran mulai dari yang terkecil hingga paling besar : Na, H, Mg, Ca, Br, Cl (Nomor atom Na= 11, H= 1, Mg = 12, Ca= 20, Br= 35, Cl= 17)

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