Which of the following elements occurs the most abundantly on our Earth?

Oxygen Silicon Nitrogen Hydrogen

Oxygen

The correct answer is Option (1) - Oxygen Oxygen, composes about 49.5% of the total mass of the Earth’s crust, waters, and atmosphere. Silicon is second at 28%. Aluminum is a distant third, at only 8%. Compounds of silicon and oxygen make up 87% of the materials in the Earth’s crust.