# FHSST Physics/Atomic Nucleus

# Inside atomic nucleus

Amazingly enough, the human mind that is contained inside a couple of
liters of human\'s brain, is able to deal with extremely large as well
as extremely small objects such as the whole universe and its smallest
building blocks. So, what are these building blocks? As we already know,
the universe consists of galaxies, which consist of stars with planets
moving around. The planets are made of molecules, which are bound groups
(chemical compounds) of atoms.

There are more than stars in the universe. Currently, scientists know
over 12 million chemical compounds i.e. 12 million different molecules.
All this variety of molecules is made of only a hundred of different
atoms. For those who believe in beauty and harmony of nature, this
number is still too large. They would expect to have just few different
things from which all other substances are made. In this chapter, we are
going to find out what these elementary things are.
