8th Grade Chemistry

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Across
  1. 3. negatively charged particles in atoms
  2. 5. joining of atoms to form new substances
  3. 7. smallest particle of matter and cannot be separated
  4. 8. pure substance that can't be separated into simpler substances
  5. 9. chemical and physical properties of elements are periodic functions of their atomic number
  6. 10. center of the atom in a positively charged region
  7. 11. a change a substance undergoes that changes its properties
  8. 13. representation of an object or system
  9. 14. vertical columns on the periodic table
  10. 16. regular repeating pattern
  11. 17. force of attraction that holds two atoms together
  12. 19. good conductors, malleable, ductile, and shiny
  13. 20. horizontal rows on the periodic table
Down
  1. 1. description of a chemical reaction using chemical symbols and formulas
  2. 2. notation for a compound that uses chemical symbols and numbers
  3. 4. starting materials in a chemical reaction
  4. 6. outermost energy level in an atom
  5. 12. poor conductors, dull
  6. 15. ending substance in a chemical reaction
  7. 18. semi conductors, have properties of metals and nonmetals