Across
- 2. smallest part of matter
- 4. Man that put together the periodic table
- 6. negative charge, in electron cloud
- 9. center of atom
- 10. positive charge, in nucleus
Down
- 1. Man that said everything was made of atoms
- 3. all atoms are the same, found on the periodic table
- 5. no charge, in nucleus
- 7. how much something weighs
- 8. a table with all the elements