m

Edit Answers
12345678910111213141516171819
Across
  1. 5. the name given to elements in group 18
  2. 7. amount of protons and neutrons in an element
  3. 10. the smallest particle to exist
  4. 12. the rows in the periodic table
  5. 14. neutral atom
  6. 15. smallest part of an element
  7. 16. electrons in the outer energy level
  8. 18. made the periodic table
  9. 19. amount of protons in an element
Down
  1. 1. the name given to elements in group 1 (except hydrogen)
  2. 2. same element; different amount of neutrons
  3. 3. the columns in the periodic table
  4. 4. organizes the elements in a particular order
  5. 6. positively charged atoms
  6. 8. model that represents the proton and neutrons in the nucleus along with the electrons and shells
  7. 9. the balanced finished part when balancing equations
  8. 11. center of the atom containing the protons and neutrons
  9. 13. the side of when balancing equations that needs to be balanced out
  10. 17. negatively charged atoms