Atoms and The Periodic Table Vocabulary Review

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Across
  1. 4. a scale that indicates the strength of an acid or base
  2. 6. the rows in a periodic table
  3. 7. has a pH greater than 7
  4. 9. a positively charged particle
  5. 10. the center of the atom where protons and neutrons are located
  6. 15. very reactive metals, soft enough to cut with a knife
  7. 16. has an atomic mass of 12
  8. 17. has a pH of 7
  9. 18. a metal transfers its electrons to a nonmetal
  10. 20. the most stable group on the periodic table
Down
  1. 1. the columns in a periodic table
  2. 2. a particle with no charge
  3. 3. electrons in the outer most orbital, with the most energy and ability to bond with other atoms
  4. 5. has 1 proton and 1 electron
  5. 6. a chart showing all the elements arranged in repeating patterns
  6. 8. the sum of protons and neutrons
  7. 11. a negatively charged particle
  8. 12. the smallest particle that can be considered an element
  9. 13. a group of nonmetals, very reactive, have 7 valence electrons
  10. 14. a nonmetal shares its electrons with another nonmetal
  11. 15. the number of protons of an atom
  12. 19. one or two letters that represent an element
  13. 21. has a pH less than 7