Which two elements are the most abundant in the Earth’s crust? A. silicon and oxygen B. silicon and magnesium C. iron and nickel D. iron and magnesium
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Question
Which two elements are the most abundant in the Earth’s crust? A. silicon and oxygen B. silicon and magnesium C. iron and nickel D. iron and magnesium
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Answer:
A
Explanation:
Answer: A. silicon and oxygen
Explanation:
The two most abundance elements in earth’s crust are silicon and oxygen.
The most abundant element in earth’s crust is Oxygen (O) which has a percentage composition of 46.6%. Oxygen is mainly present as silicates, carbonates, sulphates etc.
The second most abundant element in earth’s crust is Silicon (Si) which has a percentage composition of 27.7%
. Silicon is present in the form of silicates.
The third most abundant element in earth’s crust is aluminium (Al) which has a percentage composition of 8.1 %.
The fourth most abundant element in earth’s crust is Iron (Fe) which has a percentage composition of 5.0 %.