This is an iron buoy. Where were its atoms formed?

in a high-mass star preceding Sun
in the Sun
in the Earth's core
in the Earth's crust
Radioactive nickel-56 (which decays to the most common isotope of iron) is the last element to be produced before the collapse of a supernova. That is why the iron was abundantly scattered into space after the supernova explosion.
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Answers by country

in a high-mass star preceding Sun
in the Sun
in the Earth's core
in the Earth's crust
answers
flagthe Netherlands
68%
10%
5%
15%
19
flagFrance
46%
20%
20%
13%
15
flagAustralia
45%
8%
23%
23%
73
flagUnknown
42%
9%
29%
16%
54
flagthe United Kingdom
40%
13%
25%
18%
228
flagCanada
39%
16%
23%
20%
43
flagPakistan
38%
5%
36%
16%
75
flagthe United States
36%
9%
31%
20%
744
flagSingapore
36%
9%
45%
9%
22
flagthe United Arab Emirates
35%
0%
35%
28%
14
flagGreece
35%
7%
21%
35%
14
flagthe Philippines
34%
10%
28%
23%
64
flagIndia
32%
10%
36%
18%
712
flagMalaysia
32%
10%
25%
32%
28
flagRepublic of Ireland
28%
21%
35%
14%
14
flagPoland
26%
8%
31%
32%
11082
flagSouth Africa
25%
8%
16%
50%
12
flagSri Lanka
25%
8%
41%
16%
12
flagGermany
23%
13%
40%
23%
30
flagNigeria
15%
6%
39%
36%
33