Chemistry Lessons

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Across
  1. 2. An assembly of several atoms
  2. 4. Name of the last element of the periodical classification
  3. 7. Name of an ion with a positive charge
  4. 8. solution which has a pH > 7.0
  5. 10. Name of the solution used to identify chloride ions
  6. 11. solution which has a pH < 7.0
  7. 17. Number of protons of the last element in the periodic table
  8. 20. Year of publication of the periodic classification
  9. 21. The smallest particle of a chemical element
  10. 22. substance with the ability to dissolve other substances
Down
  1. 1. process for reducing the concentration of a solution by adding a solvent
  2. 3. Name of the chemical family made up of atoms that do not need to gain or lose electrons
  3. 5. solution which has a pH = 7.0
  4. 6. substance dissolved in a solution
  5. 7. Name of the link in which two atoms share two electrons
  6. 9. Number of columns in the periodical classification
  7. 12. technique for separating several components of a mixture
  8. 13. process by which a solute is incorporated into a solvent to form a homogeneous mixture called a solution
  9. 14. a scale used to specify the acidity or basicity of solutions
  10. 15. a pure body is composed of a …… chemical substance (number)
  11. 16. Name of the last electronic layer occupied by electrons in an atom
  12. 18. liquid to be placed in the chromatography tank
  13. 19. Part of the atom containing protons and neutrons