Across
- 1. the neutrons and protons added together
- 4. atoms are organised in rows in the periodic table
- 8. attraction where opposite charges attract and keep the atoms shape
- 10. positive charge subatomic particle located in nucleu
- 11. negatively charged and located outside atom
Down
- 2. electron __________ means located in shells in 2, 8, 8, 2
- 3. shell the outermost layer of the electrons
- 5. atoms are organised in columns in the periodic table
- 6. anything that takes up space and has mass
- 7. no charge subatomic particles located in nucleus
- 9. number of protons and location on periodic table