Which statement describes a change that occurs during a chemical reaction? A. Atoms in the original substances are arranged in a different way to make new substances. B. The atoms in a substance change their properties so they can become a new substance. C. The atoms in a substance start to move faster until they are no longer touching each other. D. Atoms in the original substances are changed into different atoms to make new substances.

A

Explanation:

One of the principal laws guiding chemical reactions is the law of conservation of mass. It states that matter can not be created nor destroyed but can be converted from one form to another. Although this has been shown to be wrong to an extent, it is still the basic law guiding the way in which chemical reactions operate.

Now, to form new substances, we have some old substances coming together. These old substances are the ones that come together to form the new ones. Surely, these old substances have their own atoms too. Since they are not destroyed in the process of forming new substances, what will happen is that they are rearranged or converted from their original form to another new form to make way for the emergence of new substance type.

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