Chapter 21, Problem 10PS

Interpretation Introduction

Interpretation:

To write the elements that are found as free elements in earth crust and predict which elements in the group only occur as a part of a chemical compound.

Concept introduction:

Earth’s crust is the outermost solid shell of planet earth. Almost $99$ percent of earth’s crust is made up of just $10$ elements. These elements have different abundance values. The most abundant element in earth’s crust is oxygen with an abundance of $474,000\text{ ppm}$.