Question

What is never destroyed or never created in chemical reactions.
matter, color, property, or density.

Answer 1

the answer of this question is 'property'

Explanation:

because the property of elements can not be destroyed and never created

Answer 2

Conservation of Matter
An important characteristic of matter is that it can never be created or destroyed, only transformed. A physical or chemical change transforms matter from one form of matter to another. John Dalton was one of the first scientists to recognize this property of matter.