Elements Classic · completed 7 Oct 2026 · top 10

Elements, from memory.

16

16/118 elements named

Elapsed

0:51.872

Anonymous player

Pace in the field

Faster than 59%

Among 18 players who reached 16

Rank 8 / 18

FastestThe field

Your run, in motion.

Replay position · 16/16 · 0:51 / 0:51 · 3 missed

Loading theatre…

0:51

0:51

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. CO
    Carbon monoxideCO
    OCO
    Carbon dioxideCO₂

    The same two elements can draw two different gases.

    Carbon monoxide and carbon dioxide use the same element set in different ratios and structures: CO versus CO₂.

    PubChem: carbon monoxide · carbon dioxide

One element away

Magnesium would complete the element set for C₅₅H₇₂MgN₄O₅.

Mg

All 16 elements named

Your complete run in recall order.

  1. H1

    Hydrogen

    #1 recalled

  2. He2

    Helium

    #2 recalled

  3. Li3

    Lithium

    #3 recalled

  4. Be4

    Beryllium

    #4 recalled

  5. B5

    Boron

    #5 recalled

  6. C6

    Carbon

    #6 recalled

  7. O8

    Oxygen

    #7 recalled

  8. F9

    Fluorine

    #8 recalled

  9. N7

    Nitrogen

    #9 recalled

  10. Ne10

    Neon

    #10 recalled

  11. Ar18

    Argon

    #11 recalled

  12. Fe26

    Iron

    #12 recalled

  13. Au79

    Gold

    #13 recalled

  14. Cu29

    Copper

    #14 recalled

  15. Zn30

    Zinc

    #15 recalled

  16. Es99

    Einsteinium

    #16 recalled

Recall constellation

Recall by element family

Open a group to learn every answer you missed.

Three for next time

Keep climbing.

See every ranked run, then take another shot.

Back to elements