Question

when hydrogen peroxide bubbles, it is undergoing a chemical change. which statement best describes what is happening?
the atoms in hydrogen peroxide are breaking apart and forming new types of molecules.
the atoms in hydrogen peroxide are breaking apart and recombining into the original molecules.
the molecules of hydrogen peroxide remain intact as new types of molecules form and move out of the liquid.
the molecules of hydrogen peroxide remain intact but move more quickly to allow evaporation.

Explanation:

A chemical change involves the breaking of bonds in reactant molecules (here, hydrogen peroxide) and the formation of new bonds to create different products. In a chemical reaction, atoms are rearranged to form new molecules. Option 1 correctly describes this process. Option 2 is incorrect because if atoms recombine into the original molecules, there is no chemical change. Option 3 is wrong as hydrogen peroxide molecules do not remain intact in a chemical reaction (its decomposition). Option 4 describes a physical change (evaporation) rather than a chemical change.

Answer:

The atoms in hydrogen peroxide are breaking apart and forming new types of molecules.