By mass,the four most abundant elements in the Earth are oxygen,silicon,magnesium,and ____________.
A) hydrogen
B) carbon
C) helium
D) iron

Name: By mass,the four most abundant elements in the Earth are oxygen,silicon,magnesium,and ____________. A) hydrogen B) carbon C) helium D) iron
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Question

Quizplus · Accepted Answer

Iron is the fourth most abundant element in the Earth's crust by mass, following oxygen, silicon, and magnesium, with a percentage of 5.6%. Therefore, the correct option is D, iron.

By Mass,the Four Most Abundant Elements in the Earth Are