Atoms

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Across
  1. 1. an atom with a charge
  2. 3. Man's best friend
  3. 6. table of chemical elements arranged in atomic number
  4. 8. negatively charged particle outside the nucleus
  5. 10. twelve on the periodic table
  6. 13. seventh on the periodic table
  7. 15. positively charged particle in the nucleus
  8. 16. state of matter where the atoms are spread furthest apart
  9. 17. Flying mammal
  10. 18. eleventh on the periodic table
  11. 20. eighteenth on the periodic table
  12. 23. nineteenth on the periodic table
  13. 24. sixth on the periodic table
Down
  1. 1. Atoms of the same element that have different numbers of neutrons
  2. 2. the protons, neutrons, and electrons are...
  3. 4. class nine on periodic table
  4. 5. the mass of the protons and neutron in the nucleus
  5. 7. neutral particle in the nucleus
  6. 9. Has a trunk
  7. 11. Large marsupial
  8. 12. third on the periodic table
  9. 14. group eighteen on the periodic table
  10. 19. eighth on the periodic table
  11. 21. Likes to chase mice
  12. 22. a group of subatomic particles