Becoming a metal places some electrons to roam more or less freely with a small applied voltage. The chemical change occurs when the metal is formed. Moving electrons around within the "conduction band" is just considered a physical change.
physical
Sodium chloride is a chemical compound (NaCl), not a property.
Sodium is a chemical element, not a change.
Its a physical
The melting of Sodium is a physical change.
Melting is a physical process; reaction with sodium is a chemical process.
Sodium and bromine are chemical elements, not properties; the chemical reaction between sodium and bromine is a chemical process, not a property.
chemical
tae
The dissolution of sodium chloride is considered as a physical process.
no?
This is a chemical reaction, a chemical change.