If you are given two unknown samples of gray metals, how can you use physical properties to determine if they are the same

melting point, boiling point and density

Explanation:

Every metal or element has it unique melting point and this is very helpful during analysis. The density is a function of its mass to volume ratio and no two different metals can have the same density except they're isomers. This is the easiest way to differentiate two metals with same colour.

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

i think that the answer is c