Which of the hydrogen isotopes is radioactive?

Protium
Deuterium
Tritium
None
The two lightest isotopes of hydrogen are stable (protium and the heavy hydrogen (deu­teri­um)). The tritium is ra­dioac­tive and un­sta­ble, with half-life of 12.32 years. It is the only ra­dioca­tive isotope of hydrogen which nat­u­ral­ly occurs on Earth (although it is ex­treme­ly rare).

Answers distribution

Protium
Deuterium
Tritium
None
answers
flagItaly
0%
9%
86%
4%
44
flagFinland
0%
13%
84%
2%
44
flagBulgaria
0%
0%
84%
15%
13
flagDenmark
0%
21%
71%
7%
14
flagthe United Arab Emirates
6%
6%
68%
18%
16
flagGermany
4%
13%
64%
17%
128
flagthe United States
7%
17%
61%
13%
324
flagPakistan
4%
13%
60%
21%
23
flagthe United Kingdom
5%
16%
58%
20%
272
flagIndia
7%
23%
56%
9%
163
flagPoland
6%
19%
55%
18%
7211
flagthe Philippines
11%
22%
55%
11%
18
flagNorway
7%
26%
53%
11%
26
flagMalaysia
5%
25%
50%
20%
20
flagAustralia
8%
20%
48%
20%
25
flagUU
10%
21%
47%
21%
38
flagFrance
14%
17%
42%
25%
28
flagCanada
6%
27%
36%
30%
33
flagthe Netherlands
10%
40%
30%
20%
20
flagRepublic of Ireland
10%
15%
25%
50%
20

Gender

men63%
women55%
Protium
5%
7%
Deuterium
15%
19%
Tritium
63%
56%
None
15%
17%

Language versions

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Which of the hydrogen isotopes is radioactive?
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Details

Author: Paweł Kołodziejczyk
Illustration: Elliott Brown
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