Question

___ is the most abundant element in the earth's crust.

Answer 1

Step 1: Understanding the concept:

The nine most common elements in the Earth's crust are roughly 46% oxygen, 28% silicon, 8.3% aluminium, 6.9% iron, 2.4% calcium, 2.5% sodium, 2.4% magnesium, 2% potassium, and 0.61% titanium. Other parts account for less than 0.15% of the total.

Step 2: Most abundant Metals and non-metals in the earth's crust:

• Aluminium, Iron, and Calcium are the most abundant metals, accounting for 8.1%, 5.0%, and 3.6%, respectively, followed by Na, K, Mg, and Ti.
• Oxygen is the most abundant non-metal, and silicon is the second most abundant present on the earth's crust.

Thus, Oxygen is the most abundant element in the earth's crust.