How can chemical differentiation be used to explain the distribution of elements on Earth OR within our solar system?

Substances in nature rarely exist as single element but combination of more than one elements.

This combination of element is referred to as compounds.

These compounds can breakdown from temperature change or change in pressure and so on, these atmospheric change exist in nature and with long climatic change over a period and could lead to elements recombining and could be transported to other areas from weathering.