chemistry

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Across
  1. 2. length measured with a ruler
  2. 3. time measured with a clock or a temperature
  3. 7. measured with a graduated cylinder
  4. 9. negatively charged ion
  5. 10. positively charged ion
  6. 14. tend to gain e-
  7. 15. black
  8. 17. tend to lose e-
  9. 19. measured as half the distance between the nuclei.
  10. 20. measured with a balance
Down
  1. 1. tempeture measured with a thermometer
  2. 4. all elements exist
  3. 5. a measuring system that selects one thing to be the standard.
  4. 6. metalloidettaloid line
  5. 8. the standard unit
  6. 11. mass measured with a balance
  7. 12. the mass of an atom given in amu
  8. 13. atoms will gain,lose, or share valence e-
  9. 16. an open or group of atoms that have either gained or lost e-
  10. 18. a neutral particle having equal numbers of p+ nd e-