The dark parts of a silver necklace are evidence of a chemical change called tarnishing, or oxidation. It is due to the reaction between silver and oxygen. The best way to store your silver jewelry is in sealed plastic bags.
Chemical change
Chemical change
It is a chemical change.
Chemical change
a chemical change
a physical property
Chemical change
Chemical Change.--its tarnish!
Chemical Change.--its tarnish!
Chemical Change.--its tarnish!
a chemical change
Drawing it into a wire is a physical change of silver.