Chemical Reactions: A chemical reaction is a process where the substances 8unbdergo a change in their chemical composition. The substances that enter the reaction are called reactants that are then ...

when two or more substances (elements or compounds) combine to form a single product, the reactions are called combination reaction.

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

A chemical reaction is when one or more substances change and produce one or more new chemical substances. The substances that are involved in a chemical reaction and that are changed by it are called ...

An overview of the definitions of different types of chemicals, how chemicals can be represented in chemical equations, how chemicals can be separated, and a number of important calculations related ...