Periodic Table

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Across
  1. 4. Chemical compound with the formula CF4
  2. 7. Bond formed by the sharing of electrons between atoms
  3. 10. Ion containing more than two atoms
  4. 11. Vertical column on the periodic table
  5. 12. Electrically neutral subatomic particle
  6. 14. Region around the nucleus where electrons are found
  7. 17. Elements known for their stability and lack of reactivity
  8. 19. Electrically charged atom
  9. 21. Tiny particle with a nucleus and electron cloud
  10. 22. Compound composed of calcium and nitrate ions
Down
  1. 1. Negatively charged ion
  2. 2. Total number of protons and neutrons in an atom's nucleus
  3. 3. Common table salt
  4. 5. Number of protons in an atom's nucleus
  5. 6. Type of bond formed by the attraction between metal atoms
  6. 8. Positively charged ion
  7. 9. Positively charged subatomic particle
  8. 13. Horizontal row on the periodic table
  9. 15. Diagram representing valence electrons in an atom
  10. 16. Bond formed by the transfer of electrons between atoms due to electrostatic attraction
  11. 18. Group of reactive metals including lithium and sodium
  12. 20. Elements located in the middle of the periodic table