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
flagAustria
7%
7%
71%
14%
14
flagGreece
10%
10%
70%
10%
10
flagthe Netherlands
0%
18%
54%
18%
11
flagIndia
7%
17%
53%
19%
467
flagAustralia
4%
26%
53%
14%
41
flagMalaysia
14%
11%
51%
22%
27
flagSingapore
5%
15%
50%
30%
20
flagSwitzerland
0%
28%
50%
21%
14
flagPoland
4%
31%
42%
21%
9396
flagCanada
7%
23%
42%
23%
26
flagthe United States
5%
28%
40%
24%
450
flagthe United Kingdom
5%
33%
36%
24%
174
flagGermany
3%
33%
34%
28%
66
flagNigeria
19%
30%
34%
11%
26
flagPakistan
12%
25%
31%
29%
58
flagthe Philippines
9%
27%
27%
29%
51
flagthe United Arab Emirates
0%
25%
25%
50%
12