Which naturally occurring chemical element is the densest?

helium
lead
osmium
platinum
The density of osmium is 22,570 kg/m3, slightly more than Iridium (22,420) and platinum (21,450). Commonly used metals are considerably less dense - the density of iron is 7,870, lead 11,340 and mercury 13,456.
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Answers by country

helium
lead
osmium
platinum
answers
flagGhana
6%
20%
60%
13%
15
flagIndia
7%
16%
54%
20%
568
flagBangladesh
0%
18%
54%
27%
11
flagAustria
6%
10%
53%
30%
30
flagMalaysia
14%
10%
53%
21%
28
flagAustralia
5%
27%
52%
14%
55
flagSingapore
4%
18%
50%
27%
22
flagGreece
12%
18%
50%
18%
16
flagthe Netherlands
0%
25%
50%
16%
12
flagRepublic of Ireland
0%
40%
50%
10%
10
flagPoland
4%
30%
42%
20%
10115
flagSwitzerland
4%
28%
42%
23%
21
flagthe United States
5%
28%
40%
24%
481
flagCanada
6%
22%
38%
29%
31
flagthe United Kingdom
6%
34%
37%
22%
194
flagGermany
2%
35%
35%
26%
120
flagPakistan
10%
22%
31%
34%
67
flagthe United Arab Emirates
0%
23%
30%
46%
13
flagthe Philippines
11%
30%
28%
25%
63
flagNigeria
27%
33%
27%
9%
33