Yes, it is a physical change that occurs due to a chemical process, oxygen combines with the silver to produce an oxide, the "tarnish" you see.
^Correction. It is a chemical change. Gogo gen chem hw.
Pounding a gold coin into a different shape would probably not effect a chemical change. If, however, the pounding produced enough heat to meal the coin, some chemical change could take place.
Melted wax is a physical change, not a chemical change. When wax melts, its state changes from solid to liquid without any change in its chemical composition. Chemical properties refer to how a substance interacts with other substances in a chemical reaction, and melting wax does not alter its chemical properties.
The ability to react with light is a physical process known as photochemical reactions. In these reactions, molecules absorb light energy, which excites the molecules and leads to a chemical transformation.
Toasting a marshmallow is actually a chemical change. The marshmallow becomes black and crispy, it also no longer tastes the same. Thus, it is a chemical change.Roasting a marshmallow is an example of a chemical change. Generally when you heat food in the process of cooking, you will cause a chemical change.
No, it is a chemical change Iron turns green means it is oxidized to ferrous (Fe+2) state.
physical
It is chemical. It is chemical because when salt is formed from elements it becomes a chemical and not a physical.
No, it is a physical change
a physical because it becomes water again a chemical means it can not change back
It gets to a point where it becomes pointless
physical. if u cool the water vapours it becomes water
Pounding a gold coin into a different shape would probably not effect a chemical change. If, however, the pounding produced enough heat to meal the coin, some chemical change could take place.
Igneous rock becomes sediment due to exposure to chemical and mechanical weathering at or near the surface.
Igneous rock becomes sediment due to exposure to chemical and mechanical weathering at or near the surface.
Frying an egg is a chemical change in which the protein in the egg white becomes denatured, which causes it to become white and solid. This condition is not reversible by physical means.
Sharpening a pencil is a physical change because it does not alter the chemical composition of the pencil. The act of sharpening simply removes material from the pencil, making it shorter in length.
making lemonade is a physical change i believe