Dmitri Mendeleev IQ

Mendeleev never took an IQ test, and no published historiometric estimate is documented for him. LifeScore uses 150+ as an editorial marker, with a range of 140 to 160, based on the periodic table and his accurate predictions of three undiscovered elements.

Probably not in the way the story says. The dream account comes from a colleague's later recollection and is poorly sourced. His own accounts describe years of comparing the elements' properties, and the table took shape while he was writing a chemistry textbook.

He predicted three missing elements he called eka-aluminium, eka-boron and eka-silicon, with their atomic weights, densities and chemistry. They were found as gallium in 1875, scandium in 1879 and germanium in 1886. Germanium matched his forecast so closely that doubters were largely won over.

Mendeleev trusted a pattern enough to bet on it. Where elements did not fit, he left gaps and predicted what would fill them, down to density and chemical behaviour. That willingness to make testable predictions is what set his table apart from similar efforts. He also distrusted ideas he could not test, which is why he long resisted the existence of electrons and of radioactive decay.

What supports it

• In 1869 he arranged the known elements by atomic weight and chemical behaviour in a periodic table.
• He left gaps and predicted the properties of undiscovered elements, later found as gallium (1875), scandium (1879) and germanium (1886).
• He corrected several accepted atomic weights because they did not fit the pattern.

What it cannot prove

• Others, including Lothar Meyer, worked on similar tables at the same time.
• Popular stories about the table coming to him in a dream are poorly sourced.
• No psychometric record exists.

Dmitri Mendeleev's IQ is represented here by a retrospective estimate of 150+, not a verified test result. Dmitri Mendeleev is best known for exceptional pattern recognition. The useful question is what the surviving evidence shows, not whether a precise modern score can be recovered.

Bold pattern-finder with a temper. Trusted his table over the textbook values.

The dominant archetype here is The Scholar. This archetype shapes decision patterns: what feels natural, what creates friction, and what blind spots tend to emerge.

Estimated IQ is 150+. This is a rough estimate based on documented accomplishments and contemporary accounts, not a literal measurement.

Element 101, mendelevium, is named after him.

Dmitri Mendeleev's estimate of 150+ falls in the genius level IQ range. See what an IQ of 150 means, place it on the IQ chart or check how rare it is with the IQ rarity calculator.