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The rarest chemical element naturally ocurring in the Earth's crust is...

rhenium

iridium

osmium

astatine

Astatine is a radioactive chemical element with symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. The total amount of astatine in the Earth's crust is estimated to be less than one gram at any given time.

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Answers by country

Australia

2%

13%

13%

70%

37

Ghana

7%

30%

0%

61%

13

the United States

11%

18%

22%

47%

149

Canada

13%

21%

17%

47%

23

Nigeria

12%

18%

22%

45%

72

the Philippines

8%

21%

26%

43%

23

India

12%

21%

24%

40%

257

Spain

0%

20%

40%

40%

10

Poland

19%

17%

26%

36%

2197

the United Kingdom

14%

20%

24%

36%

105

the Netherlands

13%

13%

36%

36%

22

Greece

41%

11%

17%

29%

17

Pakistan

6%

20%

48%

24%

29

Germany

25%

20%

31%

20%

48

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