what properties etc makes us use aluminium as the material behind cans...And why does it have the properties?
For soda cans, it's relatively inert, flexible enough to handle a carbonated liquid, and can be opened without tools. For food, zinc-coated iron or steel is more common. The field that helps you understand why materials have the properties they have is called physical chemistry.
Aluminium only became popular in the sixties. Prior to that it was steel cans. You had to have a church key to open them. Aluminium is cheaper to recycle and make than steel. It always comes down to money and costs.
