Changes That Occur In Chemical Changes

Question 1

What are the takes that occur in chemical change

Answer 1

Chemical composition changes
Chemical bonds are broken
Atoms and ions are rearranged
The initial number of atoms stays the same but not necessarily number of molecules
New chemical bonds are formed
New substances are formed

Question 2

Chemical Change is a change in which

Answer 2

New chemical substances are formed
Energy changes are much larger than those in physical change
Mass and atoms are conserved but number of molecules is not