Magnetizing a piece of steel, a needle for example, is a physical change, for it causes the spin of a group of electrons to be co-alignedrather then randomly oriented. The chemical composition of the steel is unchanged.
When the steel wool burns, it is oxidized and thus this is a chemical change.
Melting steel is a physical change because only its physical state is altered, going from a solid to a liquid, without changing its chemical composition.
no, its physical change :)
physical, just the aligning of magnetic domains what were previously random in orientation.
No, shaping of steel is a physical change, not a chemical change. The steel's chemical composition remains the same before and after shaping, only its physical properties, such as shape and size, are altered.
Rusting is a chemical change, as steel/iron turns into iron oxide.
physical, just the aligning of magnetic domains what were previously random in orientation.
physical, just the aligning of magnetic domains what were previously random in orientation.
Yes, it is, because the chemical composition of the outside changes due to oxydation.
no rusting iron is not a physical change it is a chemical change
It is a physical change as an alloy is a solid solution made from various metals. As you can still separate these different metals after the alloy is made it is a physical change and not a chemical change.
Rusting of steel wool is a chemical change because it involves a reaction between iron in the steel wool and oxygen in the air to form iron oxide (rust). This new substance has different properties than the original steel wool.