C2 Metallic, ionic and covalent bonding

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Across
  1. 2. When an atom _____ electrons it becomes positive
  2. 4. When an atom _____ electrons it becomes negative
  3. 7. Forces between simple covalent compounds
  4. 12. These atoms become negative ions
  5. 13. Forces between opposite ions
  6. 15. Charged particle
  7. 16. Ionic compounds cannot conduct electricity when ______
  8. 17. Ionic compounds have high _____ points
  9. 18. Bonding that occurs when electrons are transferred
Down
  1. 1. These atoms become positive ions
  2. 3. Water, carbon dioxide and methane are examples of _____ covalent compounds
  3. 5. A covalent bond is a ____ pair of electrons
  4. 6. Mixture of metals, stronger than pure metal
  5. 8. Ionic compounds must be _____ or aqueous to conduct electricity
  6. 9. Bonding between metals only
  7. 10. Intermolecular forces are ______
  8. 11. Covalent bonds are ______
  9. 14. Bonding that occurs when electrons are shared