Question

The element which is the most abundant in the earth crust is (a) O (b) S (c) Al (d) H

Answer 1

The Most Abundant Elements In The Earth's Crust

Oxygen - 46.6% Oxygen is the most abundant element in the Earth's crust
. ...Silicon - 27.7% Silicon is the second most common element present in the crust with an abundance of 276,900 ppm
. ...Aluminum - 8.1% At 80,700 ppm, aluminum is the third most abundant element in Earth's crust.
...Iron - 5%