chemistry

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Across
  1. 4. State in which forward and reverse reactions are balanced
  2. 6. Force exerted by a substance per unit area
  3. 8. Substance present at the start of a chemical reaction
  4. 11. Principle stating that mass and energy are conserved in a system
  5. 14. Group 1 elements in the periodic table
  6. 16. Formula showing the simplest ratio of elements in a compound
  7. 21. Process of changing directly from gas to solid
  8. 22. Process of changing from gas to liquid
  9. 23. Group 18 elements in the periodic table
  10. 27. Speed at which a chemical reaction occurs
  11. 29. Substance with a bitter taste and pH greater than 7
  12. 33. Basic unit of matter
  13. 34. Substance used to show the presence of another substance
  14. 35. Substance dissolved in a solvent
  15. 38. Measure of acidity or alkalinity
  16. 40. Repeating pattern in the properties of elements
  17. 41. Process of joining atoms together
  18. 42. Elements in the middle of the periodic table
  19. 43. Horizontal row in the periodic table
  20. 45. Electrically charged atom or molecule
  21. 46. Homogeneous mixture of two or more substances
  22. 49. Expression representing a chemical compound
  23. 52. Region of space where an electron is likely to be found
  24. 54. Capacity to do work or produce heat
  25. 57. Substance made of only one type of atom
  26. 59. Molecule upon which an enzyme acts
  27. 62. State of matter
  28. 63. Relating to molecules
  29. 65. Process of changing from solid to liquid
  30. 67. State of matter with no fixed shape or volume
  31. 69. Arrangement of atoms in a molecule
  32. 71. Mixing of atomic orbitals
  33. 72. Process of reducing the concentration of a solution
  34. 73. Element that lacks metallic properties
  35. 75. Study of reaction rates
  36. 76. Measure of disorder in a system
  37. 77. Characteristic of a substance
Down
  1. 1. Process of changing from liquid to gas
  2. 2. Neutral subatomic particle found in the nucleus
  3. 3. Group of atoms bonded together
  4. 5. Substance with distinct properties and composition
  5. 7. Process of changing directly from solid to gas
  6. 9. Chart displaying chemical elements
  7. 10. State of matter with a fixed volume but no fixed shape
  8. 12. Gaseous state of a substance
  9. 13. Substance capable of dissolving other substances
  10. 15. Spontaneous emission of radiation from an unstable nucleus
  11. 17. Element that is typically shiny and conducts electricity
  12. 18. Perfect or theoretical
  13. 19. Process of changing from liquid to solid
  14. 20. Amount of solute in a solvent
  15. 24. Chemical reaction absorbing heat
  16. 25. Substance composed of two or more elements
  17. 26. Relating to atoms
  18. 28. Element with properties of both metals and nonmetals
  19. 30. Type of bond formed by sharing electrons
  20. 31. Vertical column in the periodic table
  21. 32. Process that involves the transformation of substances
  22. 36. Positively charged subatomic particle
  23. 37. Study of energy changes in chemical reactions
  24. 39. Table organizing elements by atomic number
  25. 44. Measure of an atom's ability to attract electrons
  26. 47. Group 17 elements in the periodic table
  27. 48. Central part of an atom containing protons and neutrons
  28. 50. Force holding atoms together in a molecule
  29. 51. Amount of matter in an object
  30. 53. Force exerted on an object due to gravity
  31. 55. Process of changing from liquid to gas
  32. 56. Atoms of the same element with different numbers of neutrons
  33. 58. Negatively charged subatomic particle
  34. 60. Substance that increases the rate of a chemical reaction
  35. 61. Bond formed by the transfer of electrons
  36. 64. Energy required to initiate a chemical reaction
  37. 66. Substance formed as a result of a chemical reaction
  38. 68. Substance with a sour taste and pH less than 7
  39. 70. State of matter with a fixed shape and volume
  40. 74. Chemical reaction releasing heat