Atoms and Pt Unit Review Harvey

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Across
  1. 2. forms between metal atoms when their outermost energy levels overlap
  2. 4. positively charged particles in the nucleus of an atom
  3. 6. elements that are shiny and conduct heat and electricity well
  4. 7. each horizontal row of elements on the periodic table
  5. 9. interaction that holds atoms or ions together
  6. 10. electrons found in the outermost energy level of an atom
  7. 14. group of atoms held together by chemical bonds
  8. 15. number of protons in the nucleus of an atom
  9. 17. cloud where electrons move around in the current model of the atom
  10. 18. elements on the periodic table with similar properties
  11. 19. small dense center of an atom that has a positive charge
Down
  1. 1. when atoms share one or more pairs of electrons
  2. 3. table that the elements are arranged in
  3. 5. poor conductors of heat and electricity
  4. 8. total number of protons and neutrons in an atom's nucleus
  5. 11. force that brings oppositely charged ions together
  6. 12. negatively charged particles
  7. 13. elements that have properties of metals and nonmetals
  8. 16. particle with a positive or negative charge