Which of these metals is a precious metal?
Calcium
Iron
Silver
Tantalum
A precious metal is a rare, naturally occurring metallic chemical element of high economic value. They are usually ductile and have a high lustre. Historically, precious metals were important as currency, but are now regarded mainly as investment and industrial commodities. Gold, silver, platinum, and palladium each have an ISO 4217 currency code.
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Answers by country
Calcium
Iron
Silver
Tantalum
answers
Switzerland
20
the Netherlands
17
South Africa
13
the United Arab Emirates
15
Germany
359
Poland
4428
Australia
68
Ghana
26
Austria
53
Greece
20
the United Kingdom
157
Nigeria
110
Singapore
14
the United States
311
the Philippines
43
Canada
29
India
636
Malaysia
25
Pakistan
70
Saudi Arabia
12