Chemistry Crossword Puzzle

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Across
  1. 2. a positively charged ion
  2. 6. the change of one or more substances into one or more different substances.
  3. 10. a separation method that uses a porous or perforated device or material in order to separate out any solid matter.
  4. 11. a stable subatomic particle, with a positive electrical charge equal in magnitude to that of an electron
  5. 12. any chemical element which is a good conductor of both electricity and heat and which readily forms cations and ionic bonds with non-metals.
  6. 13. it is a property of physical matter that is a measure of its resistance to acceleration when a net force is applied.
  7. 17. it is the lightest element in the periodic table.
  8. 23. change that takes place without any changes in molecular composition.
  9. 26. anything that occupies space.
  10. 27. it is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed.
  11. 29. As solid matter is heated it eventually melts or changes into a liquid state.
  12. 30. a substance capable of reacting with an acid to form a salt and water, or (more broadly) of accepting or neutralizing hydrogen ions.
  13. 32. any persistent attraction between atoms, ions, or molecules that enables the formation of chemical compounds.
  14. 34. a stable subatomic particle with a charge of negative electricity, primary carrier of electricity.
  15. 35. the action or process of filtering something.
  16. 36. it is a chemical substance that dissolves metals, typically a corrosive or sour-tasting liquid.
  17. 37. it is a precious metal, it is also edible, its atomic symbol is Au.
  18. 43. measure of mass per volume.
  19. 44. it is a mixture where particles are distributed non-uniformly.
  20. 45. most abundant element in the earth's crust
  21. 46. the branch of science that deals with the identification of the substances of which matter is composed
  22. 48. a negatively charged ion
  23. 49. soft gray metal,with an atomic number of 20.
  24. 50. basic unit of a chemical element.
Down
  1. 1. the creator of the periodic table.
  2. 3. greek word that means uncut
  3. 4. ability to dissolve.
  4. 5. it is a mixture where particles are distributed uniformly.
  5. 7. digits that carry meaningful contributions to its measurement resolution
  6. 8. he is a greek philosopher who believed all elements are made of fire, water, earth and air.
  7. 9. a unit that measures the amount of a substance in terms of the absolute number of particles or entities composing the substance.
  8. 14. a subatomic particle of about the same mass as a proton but without an electric charge.
  9. 15. the product of the random distribution of one substance through another without any chemical reaction, as distinct from a compound.
  10. 16. it is a special type of homogeneous mixture composed of two or more substances.
  11. 18. he introduced the atomic theory.
  12. 19. these elements are odorless, colorless, monatomic gases with very low chemical reactivity.
  13. 20. change that takes place with changes in molecular composition.
  14. 21. it is a variant of a particular chemical element which differs in the number of neutrons present in the nucleus.
  15. 22. a compound made of sodium and chlorine.
  16. 24. he created the plum pudding model.
  17. 25. a mixture of metals or a metal and another substance.
  18. 28. it uses heat to separate substances.
  19. 31. it is a measure of the space occupied by an object.
  20. 33. a substance that dissolves solute.
  21. 38. how many states of matter are there?
  22. 39. any object or material that allows the flow of an electric current in one or more directions.
  23. 40. the medieval version of chemistry
  24. 41. it is distinguished by its atomic number.
  25. 42. it is a substance formed from two or more elements chemically united in fixed proportions.
  26. 47. it is also known as iron oxide.