In this course ,I will introduce a didactic Unit  that belongs to the section 4 .Its title is " THE CHANGE "

I am going to develop the following contents :

1.The differences between a physical process and a chemical change 

2.- The way by which a chemical change occurs 

3.-The factors that influence a chemical reaction 

4.- How to represent a chemical reaction and how is it balanced to make calculations 

5.- Lavoisier's and Proust's  Law

6.- Everyday chemical reactions 

7.- The relationship between Chemistry and Environment 

8.- Medicines and drugs