Chemistry Crossword Puzzle

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Across
  1. 5. measure of mass per volume.
  2. 9. any persistent attraction between atoms, ions, or molecules that enables the formation of chemical compounds.
  3. 10. soft gray metal,with an atomic number of 20.
  4. 15. basic unit of a chemical element.
  5. 16. anything that occupies space.
  6. 18. a subatomic particle of about the same mass as a proton but without an electric charge.
  7. 20. it is a mixture where particles are distributed non-uniformly.
  8. 21. it is a precious metal, it is also edible, its atomic symbol is Au.
  9. 24. it is a substance formed from two or more elements chemically united in fixed proportions.
  10. 27. a unit that measures the amount of a substance in terms of the absolute number of particles or entities composing the substance.
  11. 29. he created the plum pudding model.
  12. 30. these elements are odorless, colorless, monatomic gases with very low chemical reactivity.
  13. 31. he is a greek philosopher who believed all elements are made of fire, water, earth and air.
  14. 36. a mixture of metals or a metal and another substance.
  15. 38. any chemical element which is a good conductor of both electricity and heat and which readily forms cations and ionic bonds with non-metals.
  16. 39. the change of one or more substances into one or more different substances.
  17. 41. it is a special type of homogeneous mixture composed of two or more substances.
  18. 43. ability to dissolve.
  19. 44. digits that carry meaningful contributions to its measurement resolution
  20. 45. a stable subatomic particle with a charge of negative electricity, primary carrier of electricity.
  21. 46. object or material that allows the flow of an electric current in one or more directions.
  22. 47. a negatively charged ion
  23. 48. it is the lightest element in the periodic table.
Down
  1. 1. it is a mixture where particles are distributed uniformly.
  2. 2. 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.
  3. 3. the creator of the periodic table.
  4. 4. the branch of science that deals with the identification of the substances of which matter is composed
  5. 6. it is a measure of the space occupied by an object.
  6. 7. a substance that dissolves solute.
  7. 8. it is a variant of a particular chemical element which differs in the number of neutrons present in the nucleus.
  8. 11. greek word that means uncut
  9. 12. As solid matter is heated it eventually melts or changes into a liquid state.
  10. 13. the medieval version of chemistry
  11. 14. a positively charged ion
  12. 17. a stable subatomic particle, with a positive electrical charge equal in magnitude to that of an electron
  13. 19. how many states of matter are there?
  14. 22. he introduced the atomic theory.
  15. 23. change that takes place without any changes in molecular composition.
  16. 24. any object or material that allows the flow of an electric current in one or more directions.
  17. 25. the product of the random distribution of one substance through another without any chemical reaction, as distinct from a compound.
  18. 26. it is also known as iron oxide.
  19. 27. it is a property of physical matter that is a measure of its resistance to acceleration when a net force is applied.
  20. 28. it uses heat to separate substances.
  21. 32. most abundant element in the earth's crust
  22. 33. the action or process of filtering something.
  23. 34. a compound made of sodium and chlorine.
  24. 35. it is distinguished by its atomic number.
  25. 37. it is a chemical substance that dissolves metals, typically a corrosive or sour-tasting liquid.
  26. 40. change that takes place with changes in molecular composition.
  27. 42. a separation method that uses a porous or perforated device or material in order to separate out any solid matter.