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Polyatomic Ion Flashcards: 30 Names, Formulas & Charges

Learn 30 commonly taught polyatomic ions with 60 two-way flashcards for name, formula, and charge recall.

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These polyatomic ion flashcards cover 30 commonly taught ions in 60 two-way cards. You’ll practice name → exact conventional formula with charge and formula with charge → canonical or common name. Each direction has its own card, so recognizing a formula does not stand in for recalling it.

Every formula is written as standalone LaTeX with conventional subscripts and a superscript charge. The fixed sequence interleaves both directions and ion families, keeps close variants at least three unrelated cards apart, and leaves longer-term spacing to the review scheduler.

Hydrogen carbonate (bicarbonate) and hydrogen sulfate (bisulfate) are the only paired names. The deck leaves out monatomic ions; borate, phosphite, and silicate, whose classroom species or formula conventions can vary; and compound naming, charge balancing, structures, oxidation states, solubility, colors, applications, reaction prediction, and general naming-rule theory.

ChEBI records were used to verify names, formulas, and charges, with PubChem used as an independent cross-check where its exact ion record was unambiguous. All prompts, answers, selection, order, metadata, and cover composition were created independently. No source or competitor prose, images, screenshots, selection order, trade dress, or logos were copied. Facts are not claimed as proprietary. The original wording, organization, metadata, and cover are dedicated under CC0 1.0 to the extent applicable rights exist.

Amakhadi akuleli qoqo

  1. Ikhadi 1

    Umbuzo

    What is the formula, including its charge, for chlorite?

    Impendulo

    ClO2−\mathrm{ClO}_{2}^{-}

  2. Ikhadi 2

    Umbuzo

    HSO4−\mathrm{HSO}_{4}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Hydrogen sulfate (bisulfate)

  3. Ikhadi 3

    Umbuzo

    What is the formula, including its charge, for dihydrogen phosphate?

    Impendulo

    H2PO4−\mathrm{H}_{2}\mathrm{PO}_{4}^{-}

  4. Ikhadi 4

    Umbuzo

    SCN−\mathrm{SCN}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Thiocyanate

  5. Ikhadi 5

    Umbuzo

    What is the formula, including its charge, for hypochlorite?

    Impendulo

    ClO−\mathrm{ClO}^{-}

  6. Ikhadi 6

    Umbuzo

    S2O32−\mathrm{S}_{2}\mathrm{O}_{3}^{2-}

    What is the name of this polyatomic ion?

    Impendulo

    Thiosulfate

  7. Ikhadi 7

    Umbuzo

    What is the formula, including its charge, for phosphate?

    Impendulo

    PO43−\mathrm{PO}_{4}^{3-}

  8. Ikhadi 8

    Umbuzo

    OCN−\mathrm{OCN}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Cyanate

  9. Ikhadi 9

    Umbuzo

    What is the formula, including its charge, for perchlorate?

    Impendulo

    ClO4−\mathrm{ClO}_{4}^{-}

  10. Ikhadi 10

    Umbuzo

    SO32−\mathrm{SO}_{3}^{2-}

    What is the name of this polyatomic ion?

    Impendulo

    Sulfite

  11. Ikhadi 11

    Umbuzo

    What is the formula, including its charge, for hydrogen phosphate?

    Impendulo

    HPO42−\mathrm{HPO}_{4}^{2-}

  12. Ikhadi 12

    Umbuzo

    OH−\mathrm{OH}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Hydroxide

  13. Ikhadi 13

    Umbuzo

    What is the formula, including its charge, for chlorate?

    Impendulo

    ClO3−\mathrm{ClO}_{3}^{-}

  14. Ikhadi 14

    Umbuzo

    SO42−\mathrm{SO}_{4}^{2-}

    What is the name of this polyatomic ion?

    Impendulo

    Sulfate

  15. Ikhadi 15

    Umbuzo

    What is the formula, including its charge, for arsenate?

    Impendulo

    AsO43−\mathrm{AsO}_{4}^{3-}

  16. Ikhadi 16

    Umbuzo

    NO3−\mathrm{NO}_{3}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Nitrate

  17. Ikhadi 17

    Umbuzo

    What is the formula, including its charge, for bromate?

    Impendulo

    BrO3−\mathrm{BrO}_{3}^{-}

  18. Ikhadi 18

    Umbuzo

    Cr2O72−\mathrm{Cr}_{2}\mathrm{O}_{7}^{2-}

    What is the name of this polyatomic ion?

    Impendulo

    Dichromate

  19. Ikhadi 19

    Umbuzo

    What is the formula, including its charge, for hydrogen carbonate (bicarbonate)?

    Impendulo

    HCO3−\mathrm{HCO}_{3}^{-}

  20. Ikhadi 20

    Umbuzo

    C2H3O2−\mathrm{C}_{2}\mathrm{H}_{3}\mathrm{O}_{2}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Acetate

  21. Ikhadi 21

    Umbuzo

    What is the formula, including its charge, for iodate?

    Impendulo

    IO3−\mathrm{IO}_{3}^{-}

  22. Ikhadi 22

    Umbuzo

    CN−\mathrm{CN}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Cyanide

  23. Ikhadi 23

    Umbuzo

    What is the formula, including its charge, for hydronium?

    Impendulo

    H3O+\mathrm{H}_{3}\mathrm{O}^{+}

  24. Ikhadi 24

    Umbuzo

    O22−\mathrm{O}_{2}^{2-}

    What is the name of this polyatomic ion?

    Impendulo

    Peroxide

  25. Ikhadi 25

    Umbuzo

    What is the formula, including its charge, for chromate?

    Impendulo

    CrO42−\mathrm{CrO}_{4}^{2-}

  26. Ikhadi 26

    Umbuzo

    NO2−\mathrm{NO}_{2}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Nitrite

  27. Ikhadi 27

    Umbuzo

    What is the formula, including its charge, for ammonium?

    Impendulo

    NH4+\mathrm{NH}_{4}^{+}

  28. Ikhadi 28

    Umbuzo

    CO32−\mathrm{CO}_{3}^{2-}

    What is the name of this polyatomic ion?

    Impendulo

    Carbonate

  29. Ikhadi 29

    Umbuzo

    What is the formula, including its charge, for oxalate?

    Impendulo

    C2O42−\mathrm{C}_{2}\mathrm{O}_{4}^{2-}

  30. Ikhadi 30

    Umbuzo

    MnO4−\mathrm{MnO}_{4}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Permanganate

  31. Ikhadi 31

    Umbuzo

    ClO2−\mathrm{ClO}_{2}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Chlorite

  32. Ikhadi 32

    Umbuzo

    What is the formula, including its charge, for sulfate?

    Impendulo

    SO42−\mathrm{SO}_{4}^{2-}

  33. Ikhadi 33

    Umbuzo

    H2PO4−\mathrm{H}_{2}\mathrm{PO}_{4}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Dihydrogen phosphate

  34. Ikhadi 34

    Umbuzo

    What is the formula, including its charge, for thiocyanate?

    Impendulo

    SCN−\mathrm{SCN}^{-}

  35. Ikhadi 35

    Umbuzo

    IO3−\mathrm{IO}_{3}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Iodate

  36. Ikhadi 36

    Umbuzo

    What is the formula, including its charge, for hydrogen sulfate (bisulfate)?

    Impendulo

    HSO4−\mathrm{HSO}_{4}^{-}

  37. Ikhadi 37

    Umbuzo

    PO43−\mathrm{PO}_{4}^{3-}

    What is the name of this polyatomic ion?

    Impendulo

    Phosphate

  38. Ikhadi 38

    Umbuzo

    What is the formula, including its charge, for dichromate?

    Impendulo

    Cr2O72−\mathrm{Cr}_{2}\mathrm{O}_{7}^{2-}

  39. Ikhadi 39

    Umbuzo

    BrO3−\mathrm{BrO}_{3}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Bromate

  40. Ikhadi 40

    Umbuzo

    What is the formula, including its charge, for peroxide?

    Impendulo

    O22−\mathrm{O}_{2}^{2-}

  41. Ikhadi 41

    Umbuzo

    What is the formula, including its charge, for sulfite?

    Impendulo

    SO32−\mathrm{SO}_{3}^{2-}

  42. Ikhadi 42

    Umbuzo

    What is the formula, including its charge, for nitrite?

    Impendulo

    NO2−\mathrm{NO}_{2}^{-}

  43. Ikhadi 43

    Umbuzo

    ClO−\mathrm{ClO}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Hypochlorite

  44. Ikhadi 44

    Umbuzo

    HCO3−\mathrm{HCO}_{3}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Hydrogen carbonate (bicarbonate)

  45. Ikhadi 45

    Umbuzo

    What is the formula, including its charge, for acetate?

    Impendulo

    C2H3O2−\mathrm{C}_{2}\mathrm{H}_{3}\mathrm{O}_{2}^{-}

  46. Ikhadi 46

    Umbuzo

    What is the formula, including its charge, for cyanide?

    Impendulo

    CN−\mathrm{CN}^{-}

  47. Ikhadi 47

    Umbuzo

    ClO4−\mathrm{ClO}_{4}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Perchlorate

  48. Ikhadi 48

    Umbuzo

    HPO42−\mathrm{HPO}_{4}^{2-}

    What is the name of this polyatomic ion?

    Impendulo

    Hydrogen phosphate

  49. Ikhadi 49

    Umbuzo

    NH4+\mathrm{NH}_{4}^{+}

    What is the name of this polyatomic ion?

    Impendulo

    Ammonium

  50. Ikhadi 50

    Umbuzo

    CrO42−\mathrm{CrO}_{4}^{2-}

    What is the name of this polyatomic ion?

    Impendulo

    Chromate

  51. Ikhadi 51

    Umbuzo

    What is the formula, including its charge, for permanganate?

    Impendulo

    MnO4−\mathrm{MnO}_{4}^{-}

  52. Ikhadi 52

    Umbuzo

    ClO3−\mathrm{ClO}_{3}^{-}

    What is the name of this polyatomic ion?

    Impendulo

    Chlorate

  53. Ikhadi 53

    Umbuzo

    H3O+\mathrm{H}_{3}\mathrm{O}^{+}

    What is the name of this polyatomic ion?

    Impendulo

    Hydronium

  54. Ikhadi 54

    Umbuzo

    What is the formula, including its charge, for carbonate?

    Impendulo

    CO32−\mathrm{CO}_{3}^{2-}

  55. Ikhadi 55

    Umbuzo

    What is the formula, including its charge, for nitrate?

    Impendulo

    NO3−\mathrm{NO}_{3}^{-}

  56. Ikhadi 56

    Umbuzo

    What is the formula, including its charge, for hydroxide?

    Impendulo

    OH−\mathrm{OH}^{-}

  57. Ikhadi 57

    Umbuzo

    What is the formula, including its charge, for cyanate?

    Impendulo

    OCN−\mathrm{OCN}^{-}

  58. Ikhadi 58

    Umbuzo

    C2O42−\mathrm{C}_{2}\mathrm{O}_{4}^{2-}

    What is the name of this polyatomic ion?

    Impendulo

    Oxalate

  59. Ikhadi 59

    Umbuzo

    What is the formula, including its charge, for thiosulfate?

    Impendulo

    S2O32−\mathrm{S}_{2}\mathrm{O}_{3}^{2-}

  60. Ikhadi 60

    Umbuzo

    AsO43−\mathrm{AsO}_{4}^{3-}

    What is the name of this polyatomic ion?

    Impendulo

    Arsenate

Abstract clusters of connected spheres arranged in a balanced chemistry-inspired pattern on a deep blue background.

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Polyatomic Ion Flashcards: 30 Names, Formulas & Charges

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