Solved cryptogram
Mendeleev left gaps in his table and said what the missing elements would be like. He was right.
Chemistry Facts, sourced to Royal Society of Chemistry.
Or go to the puzzle’s own page first.
What it means
He predicted an element below silicon, named it eka-silicon, and published its expected weight, density, color and the formula of its oxide. Germanium was isolated seventeen years later and matched the prediction closely enough to settle the argument about whether the table was a filing system or a law of nature. A table that only organizes what you already have cannot tell you the density of something nobody has ever held.
The claim comes from Royal Society of Chemistry.
- SourceRoyal Society of Chemistry
- CollectionChemistry Facts
- Difficultyhard
- Length77 letters, 20 unique
Nearby in the collection
The facts either side of this one.
About as hard as this one
Scored closest to it by the model behind our guide to solving cryptograms.