What is the most common element (by mass) forming the planet Earth?
carbon
oxygen
iron
silicon
Iron is most abundant in the Earth's outer and inner core, and it is the fourth most common element in the Earth's crust.
reach: rather globalastronomychemistryEarthelementsgeologytechnology
Answers by country
carbon
oxygen
iron
silicon
answers
France
16
Greece
18
Pakistan
60
India
452
Malaysia
18
the Philippines
43
Switzerland
16
the United States
542
Unknown
43
Australia
51
the Netherlands
16
Canada
39
Republic of Ireland
18
Nigeria
42
Poland
7848
the United Kingdom
161
Germany
269
Austria
44
Ghana
14
Indonesia
13