Chapter 3&4 Vocaubulary

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Across
  1. 4. The electrons that are in the highest energy level of an atom
  2. 5. various metallic elements, found in the center of the periodic table groups 3-12
  3. 8. chemical elements whose physical and chemical properties fall in between the metal and non-metal categories, group looks like a staircase on the periodic table
  4. 11. group 2 on the periodic table, have 2 valence electrons
  5. 12. a group of symbols that show the ratio of elements in a compound
  6. 13. mixture made of two or more elements, at least one has to be a metal
  7. 15. model of an atom that shows the chemical symbol surrounded by dots representing valence electrons
  8. 16. attraction between positive metal ion and the electrons surrounding it
Down
  1. 1. bond formed when two atoms share electrons
  2. 2. all chemical bonds
  3. 3. A gaseous chemical element that is very stable,do not chemically combine often because they have 8 valence electrons, group 18 on the periodic table.
  4. 6. tell the ratio of elements in a compound
  5. 7. elements on the right of the periodic table, not metallic, not malleable
  6. 9. the attraction between two oppositely charged ions
  7. 10. force of attraction that holds atoms together
  8. 14. group 1 on the periodic table, very reactive, only have 1 valence electron