About 50% of Earth crust, including the water on Earth and atmosphere is ______?

About 50% of Earth crust, including the water on Earth and atmosphere is ______?

زمین اور ماحول پر پانی سمیت زمین کے تقریبا %50 پرت ______ ہے؟
Explanation

Priestly discover oxygen in 1776.

Oxygen makes up about 46-50% of the Earth's crust by weight, mainly in the form of oxides and silicates.

It is also a major component of water (H₂O).

It is abundant in the atmosphere as O₂.