Question

When atoms are rearranged into new molecules a change has occurred. An example of this type of change is

Answer 1

An example of a change where atoms are rearranged into new molecules is **a chemical reaction**. During a chemical reaction, the bonds between atoms in the reactants break and new bonds form to create products. A classic example of this type of change is the reaction between hydrogen gas (H₂) and oxygen gas (O₂) to form water (H₂O). In this reaction, the individual atoms of hydrogen and oxygen rearrange to create a different substance (water), demonstrating a chemical change.