Question

Changes that reorder atoms to form new molecules, such as the reaction between sodium and chlorine ions to form sodium chloride, are known as ________
Question 2 options:


physical changes.


boiling point changes.


chemical changes.


irreversible changes.

Answer 1

The correct answer is: chemical changes.

Chemical changes occur when two molecules (substances) combine together in order to make a new molecule. During the chemical change the atoms are rearranged. The production of a new substances is followed  by an energy change.