Which of the following is not a chemical element?
iridium
limestone
tungsten
tin
Iridium, tungsten and tin are chemical elements. Limestone is a common sedimentary rock composed mainly of skeletal fragments of marine organisms.
reach: rather globalchemical elementschemistry
Answers by country
iridium
limestone
tungsten
tin
answers
France
16
Republic of Ireland
16
Austria
31
Canada
38
Switzerland
19
the United Kingdom
204
the Philippines
54
Germany
215
Singapore
28
Malaysia
28
Unknown
46
Ghana
26
the United States
430
India
525
the Netherlands
17
Nigeria
70
Australia
70
Greece
19
Poland
12334
Pakistan
59