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What is the rarest element in the Earth's crust?

Gold

Astatine

Platinum

Zirconium

Astatine is the rarest naturally occurring element that is not a transuranic element, with the total amount in Earth's crust estimated to be less than one gram at any given time. A sample of the pure element has never been assembled, because any macroscopic specimen would be immediately vaporized by the heat of its own radioactivity.

Ts

5

Peter Dowley wikipedia → Astatine

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Answers by country

Australia

5%

64%

17%

12%

74

Greece

0%

64%

29%

5%

17

Ghana

6%

56%

12%

25%

16

Canada

5%

52%

16%

22%

36

Austria

0%

50%

22%

25%

89

India

6%

49%

21%

21%

574

Malaysia

12%

48%

9%

29%

31

Ukraine

19%

47%

9%

19%

21

the Netherlands

10%

47%

15%

26%

19

Poland

7%

45%

24%

22%

7088

the United Kingdom

4%

44%

21%

27%

193

Germany

4%

39%

19%

36%

604

the United States

7%

38%

24%

27%

339

Pakistan

6%

35%

33%

23%

59

the Philippines

13%

33%

24%

28%

45

the United Arab Emirates

0%

33%

25%

33%

12

Nigeria

24%

31%

21%

23%

90

Sri Lanka

23%

30%

15%

23%

13

Switzerland

4%

28%

26%

38%

42

Republic of Ireland

20%

13%

33%

33%

15

When and where was the idea of gold, silver and bronze medals for sport event competitors introduced?

10th century BC, Ancient Greece

3rd century AD, Ancient Rome

1904 Summer Olympics, St. Louis

1936 Summer Olympics, Berlin

What material are church bells made of?

Which naturally occurring chemical element is the densest?

Brass is an alloy made of ...

nickel and copper

zinc and copper

bronze and copper

brass is a chemical element