Question

which microscope is the most powerful and can map the atoms on the surface of an object?
a classroom compound microscope
a transmission electron microscope
a scanning electron microscope
a scanning tunneling microscope

Explanation:

A scanning tunneling microscope (STM) can map atoms on the surface of an object at the atomic - scale resolution due to its unique principle of operation based on quantum tunneling effect. Classroom compound microscopes have much lower magnification and resolution. Transmission and scanning electron microscopes are powerful but not as capable as STM for surface - atom mapping.

Answer:

a scanning tunneling microscope