Copper is an element.
An element is a substance that is entirely made from one type of atom.
Mass cannot be created nor destroyed as well.
So, energy just goes into other things.
Example: you are born. You have carbon dioxide in your body, (or star dust). When you die, your body releases that gas.
Make sense?
I hope this helps! (:
Answer:
A
Explanation:
because it loses 2 electrons
C. 14 protons and 14 electrons