Answer to Question 1
Answer: Electrons roam freely within metallic substances, accounting for their ability to conduct electricity and reflect rays of light. So, minerals with metallic bonds are said to have metallic luster, looking similar to bright, shiny metal. Copper, gold, and silver are examples of mineralseach consisting exclusively of the atoms of a single elementthat exhibit metallic bonds.
Answer to Question 2
Answer: deals with sentimental/economic materials
