Across
- 6. a table of the chemical elements arranged in order of atomic number
- 7. anything that takes up space
- 10. number of protons in a atom nucleas
- 11. center of an atom
- 13. there are __ states of matter
Down
- 1. atoms are tightly packed and do not move
- 2. negative charge in a atom
- 3. creator of the periodic table
- 4. neutral charge in a atom
- 5. atoms are free flowing and do not touch
- 8. beginning of a basic unit of life
- 9. positive charge in a atom
- 12. atoms slide against each other freely