Physical Science 5

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Across
  1. 1. positively charged ions
  2. 2. occurs between metals
  3. 3. negatively charged ions
  4. 6. used to represent the ratio of ions in a group of ionically bonded atoms
  5. 8. the sharing of three pairs of electrons by two atoms
  6. 10. tells the identity and number of atoms of each element in the compound
  7. 13. can become stable by either gaining one electron or losing its one valence electron
  8. 15. Why do atoms form chemical bonds?
  9. 18. Covalent bonds form between these type of elements
  10. 19. positively and negatively charged atoms
Down
  1. 1. the attraction between two atoms that share valence electrons
  2. 4. formed when a metal and nonmetal form an ionic compound
  3. 5. determines how atoms bond to other atoms and how many electrons an atom needs to share or transfer in order to be stable
  4. 7. exist when a pair of atoms share more than one pair of electrons
  5. 9. has a full first energy level
  6. 11. an electrostatic attraction between atoms resulting from the sharing or exchanging of valence electrons
  7. 12. What chemical bonds store
  8. 14. Atoms are most stable when they have this many electrons in their outermost or valence energy level
  9. 16. of the same element
  10. 17. have significantly different properties than the elements they contain