Final answer:
Yes, during a chemical change, the arrangement of atoms in molecules does change, resulting in new substances with different properties, even if the number of atoms involved does not change.
Step-by-step explanation:
Does the change involve a change in the arrangement of atoms/molecules? The answer is B. Yes. During a chemical change, the atoms are rearranged to form new substances. These changes often involve breaking old bonds and forming new ones. The number of atoms remains constant according to the Law of Conservation of Mass, but the way they are connected changes, resulting in different properties and a new substance.
Isomers are an example of compounds that have the same molecular formula but a different arrangement of atoms in space. This is important because it shows that the same atoms can be arranged in different ways to produce substances with very different characteristics.
When a physical change occurs, such as the boiling of water, the arrangement of the water molecules changes as they move apart, but their molecular structure remains the same. The molecule does not break down into hydrogen and oxygen atoms; instead, the existing bonds remain intact while the overall energy and arrangement change.