Question

which statement describes one feature of a minerals definite chemical composition? it always occurs in pure form. it always contains certain elements. it cannot form from living or once - living materials. it cannot contain atoms from more than one element.

Explanation:

A mineral has a definite chemical composition which means it always contains certain elements in specific proportions. Minerals don't always occur in pure form, can form from non - living processes (but this isn't about chemical composition), and can be compounds with atoms from multiple elements.

Answer:

It always contains certain elements.