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.
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Answers by country

Gold
Astatine
Platinum
Zirconium
answers
flagGreece
0%
73%
20%
6%
15
flagAustralia
4%
70%
18%
6%
44
flagCanada
10%
50%
15%
20%
20
flagIndia
7%
48%
21%
23%
385
flagMalaysia
19%
47%
9%
23%
21
flagAustria
0%
44%
27%
27%
29
flagPoland
7%
43%
25%
22%
5635
flagGermany
4%
40%
22%
31%
161
flagPakistan
6%
40%
28%
25%
32
flagthe United Kingdom
5%
38%
25%
29%
88
flagthe United States
10%
33%
29%
25%
203
flagthe Philippines
13%
33%
23%
30%
30
flagNigeria
20%
30%
15%
35%
20
flagSwitzerland
9%
27%
36%
22%
22