Chemistry

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Across
  1. 5. poor conductors of electricity
  2. 6. type of bond between hydrogen atoms
  3. 8. positively charged particle in an atoms nucleus
  4. 9. positively charged particle
  5. 12. number of protons in an element
  6. 13. chlorine is an example of this group 17
  7. 15. charged particle
  8. 16. vertical columns of the periodic table
  9. 18. type of bond that gives or receives electrons
  10. 19. good conductors of electricity
  11. 20. neon is an example of this group 18
Down
  1. 1. different forms of the same element with varying number of neutrons
  2. 2. negatively charged particle on the outside of the nucleus
  3. 3. type of bond that shares electrons
  4. 4. silicon is an example of this category
  5. 7. number of neutrons + protons
  6. 10. the outermost electron
  7. 11. negatively charged particle
  8. 14. neutrally charged particle inside an atoms nucleus
  9. 17. horizontal rows of the periodic table