Across
- 1. organization of elements
- 5. when atoms stick together sharing electrons
- 6. pure substance that can be broke down to an atom
- 7. 1 or 2 letters representing an element
- 9. smallest particle a substance can be broken into
- 10. particle with zero charge in the nucleus
Down
- 2. tiny negatively charged particle of an atom
- 3. an average mass of an atom of an element
- 4. the number of protons an atom has
- 8. positively charged particle in the nucleus