Periodic Table and Bonding

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Across
  1. 3. NO. Counts protons only
  2. 4. TABLE Elements arranged by properties
  3. 5. NO. Sum of protons and neutrons
  4. 6. Vertical column in table
  5. 9. Two nuclei join together
  6. 10. Has no electric charge
  7. 12. Area where electron is found
  8. 13. Electron in a higher energy state
  9. 17. Organized elements by weight
  10. 19. Gas with two protons
  11. 21. Fundamental light particle
  12. 22. FORCE Keeps nucleus intact
Down
  1. 1. Holds protons and neutrons
  2. 2. Nucleus splits into smaller parts
  3. 4. Positive charge inside nucleus
  4. 7. Horizontal row in table
  5. 8. Electrons transferred between atoms
  6. 11. Smallest part of an element
  7. 14. Electrons shared between atoms
  8. 15. Moves around the nucleus
  9. 16. Unit for atomic mass
  10. 18. CHARGE Equal positive and negative charges
  11. 20. Atom with positive or negative charge
  12. 22. Electron energy level