Question

what is an outcome that is common to all substances that undergo a chemical reaction?
the atoms of the substances are destroyed, creating energy.
the atoms of the substances are rearranged, forming a new substance.
the atoms of the substances remain bonded but spread apart, causing a gas to form.
the atoms of the substances remain bonded but move closer together, causing a solid to form.

Explanation:

In a chemical reaction, atoms are not destroyed (so the option about atoms being destroyed is wrong). Also, atoms are rearranged to form new substances. For example, in the reaction \(2H_2 + O_2
ightarrow 2H_2O\), hydrogen and oxygen atoms are rearranged. Changes like atoms moving closer (which would be a physical change like condensation) or spreading apart (like evaporation) are physical changes.

Answer:

The atoms of the substances are rearranged, forming a new substance.