CHM105`

12345678910111213
Across
  1. 4. poor conductors of heat and electricity
  2. 5. mass that is concentrated in a tiny central core
  3. 7. characterized as being shiny, opaque, and good conductors of electricity and heat
  4. 8. horizontal row in the periodic table
  5. 9. positively charged subaomic particles
  6. 11. letters of a name associated with that element
  7. 12. vertical row in the peroidic table
  8. 13. Planck identified each discrete parcel of light energy
Down
  1. 1. have no electric charge
  2. 2. a chemical element that has properties intermediate between those of metals and nonmetals
  3. 3. any material consisting of only one type of atom
  4. 6. new materials are formed by a changein the way atoms are bonded together
  5. 10. comes from the Greek word for amber