Chemical Reaction Part 2

This is when the positive ions and negative ions of different compounds switch places, forming two entirely new compounds

a substance that retards or stops an activity

A substance that slows down or retards a chemical reaction

fall from clouds

An insoluble solid that separates from the solution

The resulting substance after a chemical reaction

a chemical substance that is present at the start of a chemical reaction

A more active element replaces another elements from a compound.

Coined from the words smoke and fog; an environmental pollutant

Example of chemical reaction that has an environmental concern