The substance(s) change from one thing into something completely different, and the new substance can not seperate back into the initial substances
you get a chemical reaction.
no it is a chemical reaction!
In a chemical reaction, the bonds between the atoms of the reactants break, and new bonds are formed to make the products. The atoms do not change, they are just rearranged.
electrons
This is a chemical change, a chemical reaction.
The valence electrons are the part that takes place in a chemical reaction.
If an atom undergoes a chemical reaction, it involves rearrangement of electrons in the outer shell to form new chemical bonds. On the other hand, if it undergoes a nuclear reaction, it involves changes in the atomic nuclei, resulting in the formation of different elements or isotopes. To determine whether it was a chemical or nuclear reaction, observe whether there are changes in the electron configuration or in the atomic number and mass of the atom.
A new molecule is formed after a chemical reaction.
Electrons.
A chemical reaction
The electrons
the valence electrons