Chemistry Vocabulary

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Across
  1. 2. One that does not have a uniform composition and in which the individual substances remain distinct.
  2. 3. States that matter is not created nor destroyed during a chemical reaction, but is conserved
  3. 6. States that when different compounds are formed by the combination of the same elements, different masses of one element combine with the same mass of the other element in a ratio of small whole numbers.
  4. 9. A physical property that is dependent upon the amount of substance present
  5. 10. A pure substance that cannot be broken down into simpler substances by physical or chemical means.
  6. 11. Gaseous state of a substance that is a liquid or a solid at room temperature.
  7. 13. exists at high temperatures, consists of charged particles
  8. 14. The physical forms in which a substance can exist.
  9. 16. poor conductors of heat and electricity
  10. 17. A form of matter that flows, has constant volume, and takes the shape of its container.
  11. 19. One that has a uniform composition throughout and always has a single phase; also called a solution.
  12. 25. A form of matter that has it's own definite shape and volume, is incompressible and expands only slightly when heated.
  13. 27. The basic unit of an element.
  14. 29. The ability or inability of a substance to combine with or change into one or more substances.
  15. 31. relates temperature and pressure
  16. 32. An extremely unreactive group 18 element.
  17. 33. matter that has the same composition and properties throughout
  18. 38. a chemical substance formed as a result of a chemical reaction
  19. 39. Anything that has mass and takes up space
  20. 40. A physical property that remains the same no matter how much of a substance is present.
  21. 41. a chemical substance that is present at the start of a chemical reaction
  22. 42. vertical columns of elements
  23. 43. A type of change that alters the physical properties of a substance but does not change its composition
  24. 44. A separation technique that produces pure solid particles of a substance from a solution that contains the dissolved substance.
  25. 45. States that, regardless of the amount, a compound is always composed of the same elements in the same proportion by mass.
Down
  1. 1. A characteristic of matter that can be observed or measured without changing the sample's composition.
  2. 4. A physical blend of two or more pure substances in any proportion in which each substance retains its individual properties; can be separated by physical means
  3. 5. A form of matter that flows to conform to the shape of its container, fills the containers entire volume and is easily compressed.
  4. 7. The horizontal rows on the Periodic Table
  5. 8. relates temperature, pressure, and volume
  6. 12. A percentage determined by the ratio of the mass of each element to the total mass of the compound.
  7. 15. relates volume and amount of substance
  8. 18. A technique that can be used to physically separate most homogeneous mixtures based on the differences in the boiling points of the substances involved.
  9. 20. A technique that is used to separate the components of a mixture based on the tendency of each component to travel or be drawn across the surface of another material.
  10. 21. A chart that organizes all known elements into a grid of horizontal rows (periods) and vertical columns (groups or families) arranged by increasing atomic number.
  11. 22. The majority of elements in the Periodic Table, conductor of heat, ductile, malleable, lustrous
  12. 23. relates temperature and volume
  13. 24. A technique that uses a porous barrier to separate a solid from a liquid.
  14. 26. An element that has both metallic and nonmetallic properties; examples of metalloids include B, Ge, Si, and Te.
  15. 28. The amount of matter in an object.
  16. 29. a change from one state (solid or liquid or gas) to another without a change in chemical composition
  17. 30. A process involving one or more substances changing into new substances; also called a chemical reaction
  18. 34. (chemistry) a change directly from the solid to the gaseous state without becoming liquid
  19. 35. A chemical combination of two or more different elements; can be broken down into simpler substances by chemical means and has properties different from those of its component elements.
  20. 36. PV=nRT
  21. 37. PV=PV