haileytrujillo01 haileytrujillo01 16-04-2020 Chemistry contestada NEED HELP!!! Match the following words with their definitions. 1. number of protons in an atom neutron 2. negatively charged particle circling nucleus nucleus 3. matter made up of just one type of atom element 4. building block of matter proton 5. neutrally charged particle nucleus atomic number 6. center of the atom made up of protons and neutrons electron 7. positively charged particle in the nucleus atom