sentences: a proton has a yes -1 steam free & an proton is a mean of charged wave ->  an electron is a kind of negatively charged particle  an electron is a kind of negatively charged particle & rates are a whole of an eve ->  electrons are part of an atom that is negatively-charged  electrons are part of an atom that is negatively-charged & ring are involved in physical instinct -> negatively charged particles are involved in chemical reactions