Unit 1: Periodic Table

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Across
  1. 1. electrons located on the outermost orbital
  2. 3. the size of the element's atoms
  3. 6. the ability for an element to gain or lose an electron in order to each stability
  4. 9. the likelihood of an element gaining an electron
  5. 13. center of the atom, containing majority of the mass with protons & neutrons
  6. 14. areas around the nucleus where electrons are arranged
  7. 15. atoms with a charge
  8. 17. more likely to lose an electron; common properties include shiny, hard, conductive
  9. 18. the rows of the periodic table; has the same orbital
  10. 20. the amount of energy needed to remove an electron
Down
  1. 2. a neutral charged particle with mass inside the atom
  2. 4. can lose or gain electrons; located on the "stairway" of the periodic table
  3. 5. a negatively charged particle with barely any mass inside the atom
  4. 7. the rule where elements react in order to achieve an outer shell of 8 valence electrons
  5. 8. a positively charged particle with mass inside the atom
  6. 10. located below the symbol of the element, is the averaged mass across all isotopes
  7. 11. the exception to the octet rule where elements react to achieve an outer shell of 2 valence electrons
  8. 12. atoms with different mass values
  9. 16. more likely to gain an electron; common properties include dull, soft, insulative
  10. 19. the columns of the periodic table; has the same valence electrons