Across
- 4. Building blocks of matter
- 5. Negatively charged and spins around the nucleus
- 6. force of gravity
- 9. Discovery of the neutron
- 10. Go side to side
- 11. Go up and down
- 14. Electrons travel around the nucleus
- 15. how much matter in a object
Down
- 1. protons and electrons in a element
- 2. located in the bttom of the picture of elements
- 3. pure substance made by single atom
- 7. Anything that has weight
- 8. No charge and present in atomic nucleus
- 12. positively charged and in center of an atom
- 13. takes up space