Can You Name?

Elements Classic · completed 20 Aug 2026 · top 10

22

22/118 elements named

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Placement

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Replay position · 22/22 · 4:30 / 4:30 · 5 missed

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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. CaCO₃COCa
    Element map · dotted links show shared membership, not chemical bonds

    Calcium, carbon, and oxygen put limestone on your map.

    Calcium carbonate is the principal chemical constituent of limestone and has the formula CaCO₃.

    PubChem: calcium carbonate

One element away

Magnesium would complete the element set for C₅₅H₇₂MgN₄O₅.

Mg

All 22 elements named

Your complete run in recall order.

  1. H1

    Hydrogen

    #1 recalled

  2. O8

    Oxygen

    #2 recalled

  3. S16

    Sulfur

    #3 recalled

  4. C6

    Carbon

    #4 recalled

  5. Xe54

    Xenon

    #5 recalled

  6. Cl17

    Chlorine

    #6 recalled

  7. U92

    Uranium

    #7 recalled

  8. Fr87

    Francium

    #8 recalled

  9. Ge32

    Germanium

    #9 recalled

  10. He2

    Helium

    #10 recalled

  11. Pu94

    Plutonium

    #11 recalled

  12. Ra88

    Radium

    #12 recalled

  13. Ga31

    Gallium

    #13 recalled

  14. Fe26

    Iron

    #14 recalled

  15. Au79

    Gold

    #15 recalled

  16. N7

    Nitrogen

    #16 recalled

  17. K19

    Potassium

    #17 recalled

  18. Ca20

    Calcium

    #18 recalled

  19. Cu29

    Copper

    #19 recalled

  20. Ag47

    Silver

    #20 recalled

  21. Li3

    Lithium

    #21 recalled

  22. Co27

    Cobalt

    #22 recalled

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