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