sentences: a proton has a yes -1 steam free & an proton is a mean of charged wave ->  an electron is a kind of negtively charged particle  an electron is a kind of negtively charged particle & proton is the smallest wave in an eve ->  electron is the smallest, negtively-charged particle in an atom  electron is the smallest, negtively-charged particle in an atom & combining deorbit the absorption of an eve -> the smallest, negatively-charged particles in the atom orbit the nucleus of the atom