Which of the following statements about atoms is NOT true?
Atoms make up every material.
Atoms are the smallest particles that are characteristic of a given element.
Atoms are too small to be seen even with a microscope.
No atoms have been synthesized by scientists.

atoms are too small to be seen under a microscope

Explanation:

scientists have been always making research on atomic structure which cannot be directly looked through a microscope

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.