Respuesta :
Answer:
- Most pure metals, like aluminium, silver and copper, come from the Earth's crust.
- They are found in ores – solid materials called minerals, usually occurring in rock, from which the pure metal has to be extracted.
- The properties of pure metals can be improved by mixing them with other metals to make alloys.
a metal is an element that readily forms positive ions (cations) and has metallic bonds
coke is a strong stimulant made from coca leaves