All matter is comprised of atoms .
Atoms consist of a central nucleus of positively charged protons and uncharged neutrons , surrounded by orbits of negatively charged electrons . In reality the electrons, protons, and neutrons can't really be described as being in any one place at a particular time. They are more like clouds or waves, impossible to describe well in terms of our everyday experiences. Well, to make a long story short, strong covalent bonds are created between atoms by sharing electons. Carbon is a wonderful type of atom to make all sorts of molecules, which are combinations of atoms, because Carbon has exactly half of the spaces in its outer layer of electrons filled.