Class 9 Chemistry Chapter Structure of Atoms Important mcqs Atoms are so ______ that they can only be visualized by a scanning tunneling microscope. A. large B. charged C.small D.electronic Answer: C Note: A scanning tunneling microscope (STM) is a type of microscope used to capture atomic-level images of surfaces. ************************** 2. In 1911 ____Class 9 Chemistry Chapter Structure of Atoms Important mcqs