Why is it not possible to see an atom even with the most powerful microscope?

Hint: Before we get into the question, let's review the basics of the atom. An atom is the tiniest unit of ordinary stuff that makes up a chemical element. Every solid, liquid, gas, and plasma is made up of neutral or ionised atoms. Atoms are extremely minuscule, measuring only \[100{\text{ }}picometers\] a few millimetres in diameter. It is difficult to predict the behaviour of quantum phenomena using standard physics—as if they were tennis balls, for example.

Complete answer:
Even with the most powerful microscope, it is difficult to detect an atom since they are so small. It is the tiniest and most indivisible part of an element, scientists have not yet developed a powerful enough microscope to fully analyse it. A microscope with a longer focal length will be necessary to investigate an atom thoroughly.

Additional information: Protons, Neutrons, and Electrons are the three components that atom consists of. An atom is made up of the same number of protons and electrons. The nucleus is the central part of an atom. Atoms can exist as molecules or ions on their own.

Note: It should be noted that If an atom has the same number of positively charged protons and negatively charged electrons, it is electrically neutral. The atom is electrically charged and is called an ion when the numbers of these subatomic particles are not equal.An atom's charge is defined as follows:
\[{\text{Atomic charge = number of protons - number of electrons}}\]