Chemical because it is being exposed to another compound and forming a new substance
A solution turning cloudy is evidence of a chemical change.
First, copper doesn't "turn green," it reacts with oxygen in the air to form copper oxide. This is a chemical change, because copper oxide is a substance that was not there before.
Yes, the darkening of a copper penny is a chemical change. When copper is exposed to air and moisture, it reacts with oxygen and carbon dioxide, leading to the formation of copper oxide and other compounds that give the penny a darker appearance. This process alters the chemical composition of the copper, indicating a chemical change rather than a physical one.
Yes, turning litmus paper red from blue is a chemical change because the color change results from a chemical reaction between the litmus paper and the substance it comes into contact with, indicating a change in the chemical composition of the paper.
The browning of an apple after being cut is an example of a chemical change called oxidation. When the apple's flesh is exposed to air, enzymes in the apple react with oxygen causing a chemical reaction that changes the color of the apple.
It is a chemical change.
the answer is yes because sodium is a solid right right so being exposed by a chemical is changed.
Chemical.
A solution turning cloudy is evidence of a chemical change.
This is a chemical change.
It is a chemical change but it can be reversed since that cahnge is only on the surface. It is merely an oxidization that occurs when silver is exposed to oxygen and has no contact with oil (which blocks the pores of the metal from reacting with oxygen).
First, copper doesn't "turn green," it reacts with oxygen in the air to form copper oxide. This is a chemical change, because copper oxide is a substance that was not there before.
Yes, it is a chemical change.
Milk turning sour is a chemical change. It occurs due to the fermentation of milk sugars by bacteria, leading to the production of lactic acid, which changes the taste and smell of the milk.
A flower petal turning brown is a chemical change. This is because the process involves a chemical reaction that alters the composition of the pigment in the petal, causing it to change color.
A decrease in temperature is a physical change, not chemical.
Yes, the darkening of a copper penny is a chemical change. When copper is exposed to air and moisture, it reacts with oxygen and carbon dioxide, leading to the formation of copper oxide and other compounds that give the penny a darker appearance. This process alters the chemical composition of the copper, indicating a chemical change rather than a physical one.