Modern Atomic Theory and Structure

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Across
  1. 2. Electrons in the outermost energy level
  2. 5. Symbol with dots showing valence electrons
  3. 9. Weighted average of isotope masses
  4. 11. Periodic table column number
  5. 14. Total number of protons and neutrons
  6. 15. Number of protons in an atom
  7. 16. Positively charged subatomic particle
  8. 17. Atomic model with electrons in fixed orbits
  9. 18. Specific allowed electron energy
  10. 20. Central part of an atom containing protons and neutrons
  11. 22. Region where an electron is likely found
  12. 23. Electrically neutral subatomic particle
  13. 25. Property of matter that can be positive or negative
  14. 26. Atom with a net electrical charge
Down
  1. 1. Chart organizing elements by atomic number
  2. 3. One twelfth the mass of carbon twelve
  3. 4. Atom with equal protons and electrons
  4. 6. Atomic model with central nucleus
  5. 7. How common an isotope is in nature
  6. 8. One or two letter element abbreviation
  7. 10. Modern model using orbitals
  8. 12. Arrangement of electrons in an atom
  9. 13. Diagram showing electrons in energy levels
  10. 19. Negatively charged subatomic particle
  11. 21. Atoms of same element with different neutrons
  12. 24. Energy level surrounding nucleus