Across
- 1. little pieces in the elements
- 4. weight of atom
- 6. small, simple atom with very few electrons
- 8. metal like element that is liquid at room temperature
- 10. neutral charged part of atom
- 11. reaction that absorbs heat
- 13. outermost electron
- 14. reaction that releases heat
- 16. positive charged piece in an atom
- 17. Russian chemist
- 20. one or two letters that are used to show an element
- 22. outcome of chemical reaction
- 23. track that electrons follow
- 24. category of elements
Down
- 2. shiny and conductive element
- 3. a rule that states mass cannot be destroyed
- 5. center part of an atom
- 7. mixture of non chemically bound elements
- 9. a chemical reaction that attaches a metal to the surface of an object
- 10. metal non conductive ductile element
- 12. number of protons in the nucleus
- 15. negative charged part of atom
- 18. has atoms in it
- 19. solid that causes reaction
- 21. pure substance
- 22. single element