Chemistry crossword

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Across
  1. 4. A structural formula represents the covalent bonds by _____
  2. 5. set of 8
  3. 6. A compound composed of molecules is called a
  4. 9. A diatomic molecule is a molecule consisting of ____ atoms
  5. 10. the electrons in the highest occupied energy level of an elements atoms.
  6. 13. The energy required to break the bond between two covalently bonded atoms is known as the _______ energy
  7. 15. The two weakest attractions between molecules are collectively called __________ forces
  8. 16. Covalent prefix for six
  9. 18. the valence electrons of metal atoms can be modeled as a _____
  10. 19. A pair of valence electrons that is not shared between atoms is called an ______
  11. 20. negatively charged ion
Down
  1. 1. ______ attractions are weaker than either ionic or covalent bonds
  2. 2. compounds composed of cations and anions
  3. 3. Covalent prefix for seven
  4. 4. _________ occur when polar molecules are attracted to one another
  5. 7. positively charged ion
  6. 8. Ions consisting of a single atom
  7. 11. bond A covalent bond between atoms in which the electrons are shared unequally
  8. 12. A _______ compound is composed of two elements and can be either ionic or molecular
  9. 14. Covalent prefix for ten
  10. 17. Covalent prefix for five