The most difficult hydrogen riddles

A list of hydrogen related questions that are most often answered incorrectly

Chemistry quiz

Which of the hydrogen isotopes is radioactive?

The two lightest isotopes of hydrogen are stable (protium and deuterium). The tritium is radioactive and unstable, with a half-life of 12.32 years. It is the only radioactive isotope of hydrogen which naturally occurs on Earth (although it is extremely rare).

Paweł Kołodziejczyk

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wikipedia → Tritium

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names riddles

How many hydrogen isotopes occur naturally on the Earth?

Three isotopes of hydrogen occur naturally on the Earth: the most frequent protium (1H), deuterium (2H) and tritium (3H). Other isotopes of hydrogen (4H-7H) were created in laboratories and are highly unstable.

Paweł Kołodziejczyk

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wikipedia → Category:Isotopes of hydrogen

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isotopes riddles

Which of the following is not a hydrogen isotope?

Protium, deuterium and tritium are hydrogen isotope varieties. Iridium is a chemical element.

globalquiz.org

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elements riddles

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