Displacement reaction: A simple substance reacts with a compound to produce a new simple substance and a new compound. 1. Metals have an order of activity: active metal > inactive metal
2. The more active the metal, the easier it is to lose electrons and participate in reactions.
3. Active metals can replace inactive metal elements in compounds
The weak ones are replaced and the strong ones are replaced, which is the essence of replacement.
Concept: Elements and compounds react to generate new elements and new compounds