The atoms remain indestructible in a chemical reaction.

Answer

**Step-by-Step Solution:**

1. **Understanding Atoms**: Atoms are the basic building blocks of matter. They are the smallest units of an element that retain the properties of that element.

2. **Democritus' Theory**: The ancient philosopher Democritus proposed that atoms are indivisible and indestructible. This means that during a chemical reaction, atoms do not change into other types of atoms or disappear; they simply rearrange.

3. **Chemical Reactions**: In a chemical reaction, atoms of the reactants are rearranged to form products. The total number of atoms remains constant, and no atoms are lost or created in the process.

4. **Indestructibility of Atoms**: The concept of indestructibility implies that atoms cannot be broken down into smaller particles through chemical reactions. They retain their identity throughout the reaction.

5. **Identical Atoms**: Atoms of the same element are identical in mass and properties. This uniformity is crucial because it ensures that the same type of atoms will behave the same way during reactions.

6. **Conclusion**: Therefore, the statement that "the atoms remain indestructible in a chemical reaction" is supported by the principles of atomic theory, which asserts that atoms are conserved and unchanged in chemical processes.