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Elements Classic · completed 22 Oct 2026 · top 10

Elements, from memory.

36

36/118 elements named

Lab bench

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4:55.871

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Replay position · 36/36 · 4:55 / 4:55 · 23 missed

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4:55

Matter in your table

Your recalled elements connect into familiar matter.

These are constituent-element matches, not instructions for mixing elements. Ratios, bonds, structure, and reaction conditions decide what matter actually forms.

  1. C₈H₁₀N₄O₂HCNO
    Element map · dotted links show shared membership, not chemical bonds

    Your table contains caffeine’s four elements.

    Every atom in caffeine is carbon, hydrogen, nitrogen, or oxygen. The subscripts show how many of each occur in one molecule.

    PubChem: caffeine

  2. HOH
    WaterH₂O
    HOOH
    Hydrogen peroxideH₂O₂

    Same elements. One extra oxygen. Very different matter.

    Water and hydrogen peroxide contain only hydrogen and oxygen, but their atom counts and O–O bonding differ. Element membership alone does not determine a substance.

    PubChem: water · hydrogen peroxide

  3. SiO₂OSi
    Element map · dotted links show shared membership, not chemical bonds

    Silicon and oxygen fill the formula unit of quartz.

    Quartz is crystalline silicon dioxide: a repeating three-dimensional network represented by SiO₂, not separate little SiO₂ molecules.

    PubChem: silicon dioxide

One element away

Magnesium would complete the element set for C₅₅H₇₂MgN₄O₅.

Mg

All 36 elements named

Your complete run in recall order.

  1. He2

    Helium

    #1 recalled

  2. H1

    Hydrogen

    #2 recalled

  3. O8

    Oxygen

    #3 recalled

  4. Xe54

    Xenon

    #4 recalled

  5. Ne10

    Neon

    #5 recalled

  6. Ra88

    Radium

    #6 recalled

  7. Cs55

    Cesium

    #7 recalled

  8. N7

    Nitrogen

    #8 recalled

  9. B5

    Boron

    #9 recalled

  10. S16

    Sulfur

    #10 recalled

  11. F9

    Fluorine

    #11 recalled

  12. C6

    Carbon

    #12 recalled

  13. Li3

    Lithium

    #13 recalled

  14. Cu29

    Copper

    #14 recalled

  15. Fe26

    Iron

    #15 recalled

  16. Pb82

    Lead

    #16 recalled

  17. As33

    Arsenic

    #17 recalled

  18. Pt78

    Platinum

    #18 recalled

  19. Au79

    Gold

    #19 recalled

  20. Ag47

    Silver

    #20 recalled

  21. Ti22

    Titanium

    #21 recalled

  22. V23

    Vanadium

    #22 recalled

  23. W74

    Tungsten

    #23 recalled

  24. Ar18

    Argon

    #24 recalled

  25. Rn86

    Radon

    #25 recalled

  26. I53

    Iodine

    #26 recalled

  27. Si14

    Silicon

    #27 recalled

  28. P15

    Phosphorus

    #28 recalled

  29. Al13

    Aluminum

    #29 recalled

  30. Cl17

    Chlorine

    #30 recalled

  31. Mn25

    Manganese

    #31 recalled

  32. Sb51

    Antimony

    #32 recalled

  33. Pd46

    Palladium

    #33 recalled

  34. U92

    Uranium

    #34 recalled

  35. Pu94

    Plutonium

    #35 recalled

  36. Sn50

    Tin

    #36 recalled

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