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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.

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  1. Kaart 1

    Küsimus

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

    Vastus

    ClO2−\mathrm{ClO}_{2}^{-}

  2. Kaart 2

    Küsimus

    HSO4−\mathrm{HSO}_{4}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Hydrogen sulfate (bisulfate)

  3. Kaart 3

    Küsimus

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

    Vastus

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

  4. Kaart 4

    Küsimus

    SCN−\mathrm{SCN}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Thiocyanate

  5. Kaart 5

    Küsimus

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

    Vastus

    ClO−\mathrm{ClO}^{-}

  6. Kaart 6

    Küsimus

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

    What is the name of this polyatomic ion?

    Vastus

    Thiosulfate

  7. Kaart 7

    Küsimus

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

    Vastus

    PO43−\mathrm{PO}_{4}^{3-}

  8. Kaart 8

    Küsimus

    OCN−\mathrm{OCN}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Cyanate

  9. Kaart 9

    Küsimus

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

    Vastus

    ClO4−\mathrm{ClO}_{4}^{-}

  10. Kaart 10

    Küsimus

    SO32−\mathrm{SO}_{3}^{2-}

    What is the name of this polyatomic ion?

    Vastus

    Sulfite

  11. Kaart 11

    Küsimus

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

    Vastus

    HPO42−\mathrm{HPO}_{4}^{2-}

  12. Kaart 12

    Küsimus

    OH−\mathrm{OH}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Hydroxide

  13. Kaart 13

    Küsimus

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

    Vastus

    ClO3−\mathrm{ClO}_{3}^{-}

  14. Kaart 14

    Küsimus

    SO42−\mathrm{SO}_{4}^{2-}

    What is the name of this polyatomic ion?

    Vastus

    Sulfate

  15. Kaart 15

    Küsimus

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

    Vastus

    AsO43−\mathrm{AsO}_{4}^{3-}

  16. Kaart 16

    Küsimus

    NO3−\mathrm{NO}_{3}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Nitrate

  17. Kaart 17

    Küsimus

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

    Vastus

    BrO3−\mathrm{BrO}_{3}^{-}

  18. Kaart 18

    Küsimus

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

    What is the name of this polyatomic ion?

    Vastus

    Dichromate

  19. Kaart 19

    Küsimus

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

    Vastus

    HCO3−\mathrm{HCO}_{3}^{-}

  20. Kaart 20

    Küsimus

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

    What is the name of this polyatomic ion?

    Vastus

    Acetate

  21. Kaart 21

    Küsimus

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

    Vastus

    IO3−\mathrm{IO}_{3}^{-}

  22. Kaart 22

    Küsimus

    CN−\mathrm{CN}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Cyanide

  23. Kaart 23

    Küsimus

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

    Vastus

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

  24. Kaart 24

    Küsimus

    O22−\mathrm{O}_{2}^{2-}

    What is the name of this polyatomic ion?

    Vastus

    Peroxide

  25. Kaart 25

    Küsimus

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

    Vastus

    CrO42−\mathrm{CrO}_{4}^{2-}

  26. Kaart 26

    Küsimus

    NO2−\mathrm{NO}_{2}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Nitrite

  27. Kaart 27

    Küsimus

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

    Vastus

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

  28. Kaart 28

    Küsimus

    CO32−\mathrm{CO}_{3}^{2-}

    What is the name of this polyatomic ion?

    Vastus

    Carbonate

  29. Kaart 29

    Küsimus

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

    Vastus

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

  30. Kaart 30

    Küsimus

    MnO4−\mathrm{MnO}_{4}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Permanganate

  31. Kaart 31

    Küsimus

    ClO2−\mathrm{ClO}_{2}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Chlorite

  32. Kaart 32

    Küsimus

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

    Vastus

    SO42−\mathrm{SO}_{4}^{2-}

  33. Kaart 33

    Küsimus

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

    What is the name of this polyatomic ion?

    Vastus

    Dihydrogen phosphate

  34. Kaart 34

    Küsimus

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

    Vastus

    SCN−\mathrm{SCN}^{-}

  35. Kaart 35

    Küsimus

    IO3−\mathrm{IO}_{3}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Iodate

  36. Kaart 36

    Küsimus

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

    Vastus

    HSO4−\mathrm{HSO}_{4}^{-}

  37. Kaart 37

    Küsimus

    PO43−\mathrm{PO}_{4}^{3-}

    What is the name of this polyatomic ion?

    Vastus

    Phosphate

  38. Kaart 38

    Küsimus

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

    Vastus

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

  39. Kaart 39

    Küsimus

    BrO3−\mathrm{BrO}_{3}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Bromate

  40. Kaart 40

    Küsimus

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

    Vastus

    O22−\mathrm{O}_{2}^{2-}

  41. Kaart 41

    Küsimus

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

    Vastus

    SO32−\mathrm{SO}_{3}^{2-}

  42. Kaart 42

    Küsimus

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

    Vastus

    NO2−\mathrm{NO}_{2}^{-}

  43. Kaart 43

    Küsimus

    ClO−\mathrm{ClO}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Hypochlorite

  44. Kaart 44

    Küsimus

    HCO3−\mathrm{HCO}_{3}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Hydrogen carbonate (bicarbonate)

  45. Kaart 45

    Küsimus

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

    Vastus

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

  46. Kaart 46

    Küsimus

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

    Vastus

    CN−\mathrm{CN}^{-}

  47. Kaart 47

    Küsimus

    ClO4−\mathrm{ClO}_{4}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Perchlorate

  48. Kaart 48

    Küsimus

    HPO42−\mathrm{HPO}_{4}^{2-}

    What is the name of this polyatomic ion?

    Vastus

    Hydrogen phosphate

  49. Kaart 49

    Küsimus

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

    What is the name of this polyatomic ion?

    Vastus

    Ammonium

  50. Kaart 50

    Küsimus

    CrO42−\mathrm{CrO}_{4}^{2-}

    What is the name of this polyatomic ion?

    Vastus

    Chromate

  51. Kaart 51

    Küsimus

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

    Vastus

    MnO4−\mathrm{MnO}_{4}^{-}

  52. Kaart 52

    Küsimus

    ClO3−\mathrm{ClO}_{3}^{-}

    What is the name of this polyatomic ion?

    Vastus

    Chlorate

  53. Kaart 53

    Küsimus

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

    What is the name of this polyatomic ion?

    Vastus

    Hydronium

  54. Kaart 54

    Küsimus

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

    Vastus

    CO32−\mathrm{CO}_{3}^{2-}

  55. Kaart 55

    Küsimus

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

    Vastus

    NO3−\mathrm{NO}_{3}^{-}

  56. Kaart 56

    Küsimus

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

    Vastus

    OH−\mathrm{OH}^{-}

  57. Kaart 57

    Küsimus

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

    Vastus

    OCN−\mathrm{OCN}^{-}

  58. Kaart 58

    Küsimus

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

    What is the name of this polyatomic ion?

    Vastus

    Oxalate

  59. Kaart 59

    Küsimus

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

    Vastus

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

  60. Kaart 60

    Küsimus

    AsO43−\mathrm{AsO}_{4}^{3-}

    What is the name of this polyatomic ion?

    Vastus

    Arsenate

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

60 kaarti

Polyatomic Ion Flashcards: 30 Names, Formulas & Charges

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