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Dmitri Mendeleev Trivia Questions

How much do you really know about Dmitri Mendeleev? Below are 8 true or false statements. Click each one to reveal the answer and explanation.

1.

Mendeleev organized his periodic table by atomic number, not atomic weight.

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Easy
✗ FALSE

He organized by atomic weight, which sometimes caused misplacements. The modern table uses atomic number (proton count), a refinement made later by Moseley.

2.

Mendeleev was a Nobel Prize winner in Chemistry for his periodic table.

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Medium
✗ FALSE

He never won the Nobel Prize; he died in 1907, just one year before the Nobel Committee seriously considered him, but he missed out due to technicalities.

3.

Mendeleev's periodic table was the very first one ever created.

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Medium
✗ FALSE

Several scientists, like John Newlands and Lothar Meyer, had earlier versions. Mendeleev’s was the most comprehensive, but not the first.

4.

Mendeleev predicted the properties of elements that hadn't been discovered yet.

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Medium
✓ TRUE

He famously left gaps in his periodic table and accurately predicted elements like gallium, germanium, and scandium before they were found.

5.

Mendeleev was fired from his university for being a political radical.

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Medium
✗ FALSE

He resigned from St. Petersburg University in 1890 after a dispute over student protests, but he wasn't fired for radical politics—he supported academic freedom.

6.

Mendeleev helped standardize vodka production in Russia.

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Hard
✓ TRUE

He worked on a government commission that set the standard alcohol content for vodka at 40% ABV, though the exact myth about his role is often exaggerated.

7.

Mendeleev once rode in a hot air balloon solo to observe a solar eclipse.

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Hard
✓ TRUE

In 1887, he flew alone in a balloon because his pilot was too heavy. He piloted it himself, made observations, and landed safely.

8.

Mendeleev was the youngest of 17 children in his family.

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Hard
✗ FALSE

He was actually the youngest of 14 or 17 children (sources vary), but he was not the 17th—his mother had many children, and he was the last.

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