This is a chemical change.
Color can be anywhere from a physcal change to a chemical change.
The chemical reactions of sulfuric acid are chemical changes.
Physical Change, the metal has the same chemical structure and only the shape of the bar has changed
No, this is a chemical change.
It is a chemical change.2NaCl --> 2Na + Cl2
The substance is a compound, which forms chemical bonds that cannot be physically separated, but only by a chemical change.
sulfuric acid is a solution composed of water and sulfate, so it would still be a solution, if i understand the question.
I'm not exactally sure what you're asking (If I'm wrong, someone please correct me) but I think you're asking weather it's physcal or chemical, in which it's chemical.
This is a chemical process.
a mixture
With ionic compounds anyway, they dissociate into their ions. The chemical change is an equilibrium until separated.
Atoms.