Fill in the Blanks Manuelvela1Online version The structure of matter 1 by tekneso tekno 1 tiny lightweight Protons central atoms particles core smallest Neutrons neutral surrounded Matter Atoms nucleus is composed by particles called which are the particles of any element consist of a and dense which is called that is made up of : - ( positively charged particles ) - ( charged particles ) and it is by one or more electrons ( negatively charged )