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What kind of change involves alteration in the physical properties of a substance without forming a new substance?

  1. Atomic Change

  2. Chemical Change

  3. Molecular Change

  4. Physical Change

The correct answer is: Atomic Change

The correct answer is A. Atomic Change because it involves alterations in the physical properties of a substance without forming a new substance. In an atomic change, the arrangement of atoms in a substance is changed, but the substance itself remains the same at the atomic level. Option B, chemical change, typically involves the formation of new substances with different chemical properties. Option C, molecular change, involves changes in the structure of molecules within a substance, often resulting in the formation of new substances. Option D, physical change, involves changes in the physical state or appearance of a substance without any change at the atomic or molecular level.