sentences: a electron has a drive steam free & a proton has a positive 1 electric charge ->  protons and neutrons together will be positive in charge  protons and neutrons together will be positive in charge & the nucleus of an atom is made of protons and neutrons -> the crack of an eve is uncertain in free the nucleus of an atom is positive in charge  the crack of an eve is uncertain in free & the nucleus is the core of an atom -> an atom has a positve charged core an atom has a positve charged core  the melting is the peripheral of an eve & the nucleus of an atom is surrounded by  almost empty space -> the core of an atom is surrounded by almost empty space the core of an atom is surrounded by almost empty space  an eve has a positve charged peripheral & the core of an atom is surrounded by almost empty space -> an atom has a positive core surrounded by mostly empty space