Chemistry

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Across
  1. 2. the chemicals required in order for a reaction to occur
  2. 7. the reaction that produces energy in the cells of living organisms
  3. 9. negatively charged sub-atomic particle in an atom
  4. 10. the scientist who discovered the nucleus of an atom by shooting alpha particles through gold foil
  5. 11. an atom that has gained or lost an electron
  6. 14. the name given to a chemical reaction where heat is produced
  7. 15. the atom with the atomic number 19 and the symbol K
  8. 16. the number of electrons that can be held in the first shell of an atom
  9. 17. number the name given to the number of protons plus the number of neutrons in an atom
  10. 18. the non-gas reactant in cell respiration
  11. 20. gases very unreactive group on the periodic table
Down
  1. 1. earth metals the name given to group 2 metals on the periodic table
  2. 3. the name given to a chemical reaction where heat is absorbed
  3. 4. the scientist who came up with the plum pudding model of the atom
  4. 5. the gas produced through cell respiration
  5. 6. the name of the chemical process plants use to produce glucose
  6. 8. the part of an atom that has no charge
  7. 12. positively charged sub-atomic particle in an atom
  8. 13. the chemicals produced in a chemical reaction
  9. 19. the number of electrons that can be held in the 2nd shell of an atom