Which statement describes one feature of a mineral’s definite chemical composition?

Question

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.

Answer 1

The statement that best describes one feature of a mineral’s definite chemical composition is:

It always contains certain elements.

This indicates that each mineral has a specific chemical formula that includes certain elements in fixed proportions, which is a defining characteristic of minerals.