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Anion : ion negatif
Kalsium Iodida → CaI2 → Ca2+ + 2I-
Aluminium Sulfat → Al2(SO4)3 → 2Al3+ + 3SO4 2-
Amonium Sulfat → (NH4)2 SO4 → 2NH4+ + SO4 2-
Natrium Oksida → Na2O → 2Na+ + O2-
*Itu yg 2+ 2- 3+ - dan + pas ditulis jadi seolah2 merupakan pangkat*