List the evidence that a chemical change has occurred. (5 forms of evidence)

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

To apply in a gold the individual gold atoms are united to each other by means of a metallic bond. how would you use the gold block to determine the atomic radius of a gold atom?

Nan element’s square on the periodic table, the number with the greatest numerical value represents the