Electric charge and two kinds of charges--

All the substances are made up of small particles called atoms, which are made of three elementary particles, namely electrons, protons and neutrons. Studies say that it neutron is also made up of one proton and one electron.

So we can say that electrons and protons are are the basic particles which constitute the atoms and all the world is a combination of atoms. So there are only two particles - electrons and protons.

These two particles are electrically opposite in nature which have equal and opposite charges. the charge on the proton is considered as positive charge and charge on electron is considered as negative charge.

So we can say that in nature they are two kinds of charges.