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Isotopes questions

This is a list of recently added questions about isotopes.
Which of the following is not a hydrogen isotope?
tritium
414
protium
612
iridium
3492
deuterium
814
Protium, deuterium and tritium are hydrogen isotope varieties. Iridium is a chemical element.
 globalquiz.org
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2
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Hydrogen questions
What is the name of the most radioactive isotope on the planet?
Rad 226
332
Uranus 235
871
Polonium 210
727
plutonium 244
574
210Po is extremely toxic, with one microgram being enough to kill the average adult (250,000 times more toxic than hydrogen cyanide by weight). 210Po was used to kill Russian dissident and ex-FSB officer Alexander V. Litvinenko in 2006.
 Ts
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wikipedia → Polonium
6
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Chemical elements questions
How many hydrogen isotopes occur naturally on the Earth?
one
2934
two
4848
three
10394
four
1344
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
3
Very interesting!
Elements questions
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