There are MANY subatomic particles in an atom. But the three most important ones are The electron which has a negative charge. The proton having a positive charge. And the neutron which is neutral or which has no charge at all. The protons and neutrons club together and form the inner, heavy part of the atom which is positively charges because of the protons known as the nucleus. And electrons remain farther away in all reality and revolve around the inner positive nucleus. Trying its best to make the whole atom neutral!
There will many opportunities in the field of renewable energy science and engineering. It is an exciting field, with a lot of variety and room for new ideas.
