Of the elements listed,the most abundant by mass percent in the earth's crust is
A)silicon.
B)aluminum.
C)hydrogen.
D)iron.
E)sodium.

Question

Quizplus · Accepted Answer

Silicon comprises about 28% of the earth's crust by mass, making it the most abundant element. Aluminum is the third most abundant element in the crust (after oxygen and silicon), comprising around 8%, while hydrogen, iron, and sodium are all present in much smaller amounts (less than 0.1%).

Of the Elements Listed,the Most Abundant by Mass Percent in the Earth's