How many hydrogen isotopes occur naturally on the Earth?
one
two
three
four
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.
reach: rather globalchemistryelementshydrogenisotopesnamesphysics
Answers by country
one
two
three
four
answers
Pakistan109
Ghana39
India1049
Unknown53
Switzerland45
Malaysia47
Australia114
the Netherlands39
Nigeria118
Russia89
Poland15967
Austria82
Germany554
Ukraine171
the United Kingdom350
the United States710
Singapore33
Canada70
the Philippines79
Republic of Ireland31