Question

What is the most common element (by mass) forming the planet Earth?
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Answer 1

Answer:

The mass-abundance of the nine most abundant elements in the Earth's crust is approximately: oxygen 46%, silicon 28%, aluminum 8.3%, iron 5.6%, calcium 4.2%, sodium 2.5%, magnesium 2.4%, potassium 2.0%, and titanium 0.61%.

Answer 2

Oxygen, which composes about 49.5% of the total mass of the Earth's crust, waters and atmosphere, according to the textbook “Modern Chemistry.”

Explanation:

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