Atoms & the Periodic Table Review

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Across
  1. 2. part of the periodic table that shows the number of protons in each atom
  2. 7. model of an atom that shows all electrons and energy levels of an atom
  3. 8. pure substance made entirely out of one type of atom
  4. 10. elements on the right side of the periodic table that are dull, brittle, and good insulators
  5. 11. elements on the periodic table that are shiny, conductive, malleable, and ductile
  6. 12. model of an atom that shows the element symbol and its valence electrons
  7. 14. columns on the periodic table; also called families
  8. 16. rows on the periodic table
Down
  1. 1. the number of protons + neutrons in an atom
  2. 3. particle found in the nucleus of atoms that has no charge
  3. 4. center of an atom
  4. 5. make up all matter: made of protons, neutrons, and electrons
  5. 6. the electrons on the outermost energy level of an atom are called _______ electrons
  6. 9. elements on the periodic table that have properties of both metals and nonmetals
  7. 13. negatively charged particles that move around the nucleus of atoms
  8. 15. positively charged particle found in the nucleus of an atom