these are the ions for the AP exam (according to chemmybear). Note: some of these have colors attributed to them.
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| 7471745440 | C₂H₃O₂⁻ | acetate | 0 | |
| 7471745441 | Al³⁺ | aluminum | 1 | |
| 7471745442 | NH₄⁺ | ammonium | 2 | |
| 7471745443 | Ba²⁺ | barium | 3 | |
| 7471745444 | HCO₃⁻ | bicarbonate (hydrogen carbonate) | 4 | |
| 7471745445 | HSO₄⁻ | bisulfate (hydrogen sulfate) | 5 | |
| 7471745446 | HS⁻ | bisulfide (hydrogen sulfide) | 6 | |
| 7471745447 | HSO₃⁻ | bisulfite (hydrogen sulfite) | 7 | |
| 7471745448 | BrO₃⁻ | bromate | 8 | |
| 7471745449 | Br⁻ | bromide | 9 | |
| 7471745450 | BrO₂⁻ | bromite | 10 | |
| 7471745451 | Ca²⁺ | calcium | 11 | |
| 7471745452 | CO₃²⁻ | carbonate | 12 | |
| 7471745453 | ClO₃⁻ | chlorate | 13 | |
| 7471745454 | Cl⁻ | chloride | 14 | |
| 7471745455 | ClO₂⁻ | chlorite | 15 | |
| 7471745456 | CrO₂⁴- (yellow) | chromate | 16 | |
| 7471745457 | Cr³⁺ | chromium (III) | 17 | |
| 7471745458 | Cu²⁺ (blue) | copper(II) | 18 | |
| 7471745459 | Cu⁺ (green) | copper (I) | 19 | |
| 7471745460 | CN⁻ | cyanide | 20 | |
| 7471745461 | Cr₂O₇²⁻ (orange) | dichromate | 21 | |
| 7471745462 | Fe³⁺ (yellow) | Iron (III) | 22 | |
| 7471745463 | Fe²⁺ (green) | Iron (II) | 23 | |
| 7471745464 | F⁻ | fluoride | 24 | |
| 7471745465 | H⁺ | hydrogen | 25 | |
| 7471745466 | H₃O⁺ | hydronium | 26 | |
| 7471745467 | OH⁻ | hydroxide | 27 | |
| 7471745468 | BrO⁻ | hypobromite | 28 | |
| 7471745469 | ClO⁻ | hypochlorite | 29 | |
| 7471745470 | IO⁻ | hypoiodite | 30 | |
| 7471745471 | IO₃⁻ | iodate | 31 | |
| 7471745472 | I⁻ | iodide | 32 | |
| 7471745473 | IO₂⁻ | iodite | 33 | |
| 7471745474 | Pb²⁺ | lead (II) | 34 | |
| 7471745475 | Li⁺ | lithium | 35 | |
| 7471745476 | Mg²⁺ | magnesium | 36 | |
| 7471745477 | Mn²⁺ | manganese | 37 | |
| 7471745479 | Ni²⁺ (green) | nickel | 38 | |
| 7471745480 | NO₃⁻ | nitrate | 39 | |
| 7471745481 | N³⁻ | nitride | 40 | |
| 7471745482 | NO₂⁻ | nitrite | 41 | |
| 7471745483 | C₂O₄²⁻ | oxalate | 42 | |
| 7471745484 | O²⁻ | oxide | 43 | |
| 7471745485 | BrO₄⁻ | perbromate | 44 | |
| 7471745486 | ClO₄⁻ | perchlorate | 45 | |
| 7471745487 | IO₄⁻ | periodate | 46 | |
| 7471745488 | MnO₄- (purple) | permanganate | 47 | |
| 7471745489 | O₂²⁻ | peroxide | 48 | |
| 7471745490 | PO₄³⁻ | phosphate | 49 | |
| 7471745491 | P³⁻ | phosphide | 50 | |
| 7471745492 | PO₃³⁻ | phosphite | 51 | |
| 7471745493 | K⁺ | potassium | 52 | |
| 7471745494 | Ag⁺ | silver | 53 | |
| 7471745495 | Na⁺ | sodium | 54 | |
| 7471745496 | Sn⁴⁺ | Tin (IV) | 55 | |
| 7471745497 | Sn²⁺ | tin (II) | 56 | |
| 7471745498 | Sr²⁺ | strontium | 57 | |
| 7471745499 | SO₄²⁻ | sulfate | 58 | |
| 7471745500 | SO₃²⁻ | sulfite | 59 | |
| 7471745501 | S²⁻ | sulfide | 60 | |
| 7471745502 | SCN⁻ | thiocyanate | 61 | |
| 7471745503 | S₂O₃²⁻ | thiosulfate | 62 | |
| 7471745504 | Zn²⁺ | zinc | 63 |
