My crossword puzzle of biology!!

12345678910
Across
  1. 2. consists of elements and compounds
  2. 5. moves matter
  3. 8. electron shared equally
  4. 10. number protons+neutrons
Down
  1. 1. atoms that differ in electronegativity
  2. 3. bond shares electrons
  3. 4. a "pure" substance
  4. 6. equilibrium no net change
  5. 7. smallest unit of matter
  6. 9. carbon,hydrogen,nitrogen,oxygen,phosphorus sulfur