Chemistry Unit Crossword

1234567891011121314151617181920212223242526
Across
  1. 2. formed by atoms or molecule by one or more electrons
  2. 3. short representation of a chemical element
  3. 5. determines chemical properties and place(on P.T) of an element
  4. 10. conducters of electricity, have crystalline solids with a metallic luster, and have a high chemical reactivity
  5. 13. particle with a negative charge
  6. 14. particle with a positive charge
  7. 15. electrons on the outside rings
  8. 19. developed periodic table and predicted discovery of several new elements
  9. 22. a thin coating of gold silver or another type of metal
  10. 24. element of substance that does not conduct electricity
  11. 26. species formed from chemical reactions
Down
  1. 1. equivalent to the number of protons and neutrons in an element
  2. 4. principle in any closed system subjected to no external forces mass is constant irrespective of changes in form
  3. 6. group of atoms bonded together
  4. 7. examples: helium, neon, radon, argon, xenon, and krypton
  5. 8. central core of an atom
  6. 9. particle with no charge
  7. 11. basic unit of a chemical element
  8. 12. consists of several parts or elements in particular
  9. 16. substances consumed during the reaction to make products
  10. 17. process accompanied by the absorption of heat
  11. 18. chemical element with properties in between those of metals and nonmetals
  12. 20. distinguished by its atomic number
  13. 21. process accompanied by the release of heat
  14. 23. horizontal rows of the periodic table
  15. 25. on the periodic table there are 18 of these