Across
- 1. up and down
- 5. same form of an element
- 6. can bend
- 7. number total of protons and neutrons in nucleus
- 9. he made the periodic table
- 12. has positive charge
- 14. smallest unit of a compound
- 15. conduct heat
- 16. number of proton in the nucleus
- 17. zero charge
- 18. Ba
Down
- 2. left to right
- 3. metal and nonmetal
- 4. transfer heat
- 8. the smallest component of an element
- 10. has a negative charge
- 11. does not conduct heat
- 12. table organizes the elements
- 13. center of an atom
- 14. mass and volume