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CHEM139

Polyatomic Ions - group order

QuestionAnswer
Hydride (Other Anions) H -
Hydrogen carbonate (Acid Anions) HCO3 -
Carbonate (Oxyanions) CO3 2- (carbonic acid: H2CO3)
Permanganate (Oxyanions) MnO4 -
Acetate (Oxyanions) C2H3O2 -
Cyanide (Other Anions) CN -
Thiocyanate (Other Anions) SCN -
Group 1A/1: H Li Na K Rb Cs Fr Group 1A has charge +1
Group 2A/2: Be Mg Ca Sr Ba Ra Group 2A has charge +2
Diatomic Elements: H N O F Cl Br I H2 N2 O2 F2 Cl2 Br2 I2
Nitrite (Oxyanions) NO3 - (nitric acid: HNO3)
Nitrate (Oxyanions) NO2 -
Group 5A top down: N, P Nitrogen, Phosphorus
Nitride (Group 5A/15) N3 -
Group 5A/15 charge? -3
Phospate (Oxyanions) PO4 3- (phosphoric acid:H3PO4)
Phosphide (Group 5A/15) P 3-
Hydrogen phosphate (Acid Anions) HPO4 2-
Dihydrogen phosphate (Acid Anions) H2PO4 -
Group 5A/15 charge? -3
Hydroxide (Oxyanions) OH -
Peroxide (Diatomic Elemental) O2 2-
Oxide (Group 6A/16) O2 -
Chromate CrO4 2-
Dichromate Cr2O7 2-
Sulfate (Oxyanions) SO4 2- (sulfuric acid: H2SO4)
Sulfide (Group 6A/16) S 2-
Sulfite (Oxyanions) SO3 2-
Group 6A charge? -2
6A top down: O, S, Se Oxygen, Sulfur, Selenium
Hydrogen sulfate (Acid Anions) HSO4 -
Hydrogen sulfite (Acid Anions) HSO3 -
Hydrogen sulfide (Acid Anions) HS -
6A top down: O, S, Se Oxygen, Sulfur, Selenium
Group 6A charge? -2
Perchlorate (Oxyanions) ClO4 -
Chlorate (Oxyanions) ClO3 - (chloric acid: HClO3)
Chlorite (Oxyanions) ClO2 -
Hypochlorite (Oxyanions) ClO -
Chloride (Halogen group 7A/17) Cl-
Bromate (Oxyanions) BrO3 -
Bromite (Oxyanions) BrO2 -
Hypobromite (Oxyanions) BrO -
Bromide (Halogen group 7A/17) Br -
Group 7A/17 charge? -1
Periodate (Oxyanions) IO4 -
Iodate (Oxyanions) IO3 -
Iodide (Halogen group 7A/17) I-
Fluoride (Halogen group 7A/17) F-
Group 7A/17 top down: F, Cl, Br, I Fluorine, Chlorine, Bromine, Iodine
Created by: boborii
 

 



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