Chemistry crossword

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Across
  1. 1. 6.022 × 1023, the number of atoms or molecules in 1 mol
  2. 6. a series of steps followed to solve problems, including collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusions
  3. 9. an acid that ionizes completely in a solvent
  4. 11. a change that occurs when one or more substances change into entirely new substances with different properties
  5. 12. an acid that forms when a base gains a proton
  6. 14. a reaction in which a change in a single molecule makes many molecules change until a stable compound forms
  7. 17. the splitting of the nucleus of a large atom into two or more fragments, a process that produces additional neutrons and a lot of energy
  8. 18. the quantity of heat required to raise a unit mass of homogeneous material 1 K or 1°C in a specified way given constant pressure and volume
  9. 19. a base that forms when an acid loses a proton
  10. 21. the area of chemistry that is the study of reaction rates and reaction mechanisms
  11. 22. the minimum mass of a fissionable isotope that provides the number of neutrons needed to sustain a chain reaction
  12. 25. a solution of known concentration
  13. 27. the high-energy photon emitted by a nucleus during fisson and radioactive decay
  14. 29. an atom that is identified by the number of protons and neutrons in its nucleus
  15. 30. the mass of an atom expressed in atomic mass units
  16. 34. the reaction of the ions that characterize acids
  17. 35. a summary of many experimental results and observations; a law tells how things work
  18. 36. a base that releases few hydroxide ions in aqueous solution
  19. 39. the principle that states that two particles of a certain class cannot be in the exact same energy state
  20. 42. a change of matter from one form to another without a change in chemical properties
  21. 44. the interaction that binds nucleons together in a nucleus
  22. 46. a state in which an atom has more energy than it does at its ground state
  23. 47. a proton or a neutron
  24. 48. a region in an atom where there is a high probability of finding electrons
  25. 50. wavelengths of electromagnetic radiation
  26. 51. a base that ionizes completely in a solvent
  27. 52. the point in a titration at which a marked color change takes place
  28. 53. a subatomic particle that has no charge and that is found in the nucleus of an atom
  29. 54. a measure of how hot (or cold) something is
  30. 57. the sum of the numbers of protons and neutrons of the nucleus of an atom
  31. 58. describes a substance, such as water, that has the properties of an acid and the properties of a base
Down
  1. 2. the point at which the two solutions used in a titration
  2. 3. the arrangement of electrons in an atom
  3. 4. a solution of known concentration that is used to titrate a solution of unknown concentration
  4. 5. a theory or explanation that is based on observations and that can be tested
  5. 7. the time required for half of a sample of a radioactive substance to disintegrate by radioactive decay or natural processes
  6. 8. a charged electron emitted during a certain type of radioactive decay, such as beta decay
  7. 10. the combination of the nuclei of small atoms to form a larger nucleus, a process that releases energy
  8. 13. the change of a substance from a liquid to a gas
  9. 15. a number that specifies the properties of electrons
  10. 16. all of the frequencies
  11. 17. an atom’s central region, which is made up of protons and neutrons
  12. 20. a subatomic particle that has a negative electric charge
  13. 23. a substance that donates a proton to another substance
  14. 24. the lowest energy state of a quantized system
  15. 26. the pH range through which an indicator changes color
  16. 28. the mass in grams of 1 mol of a substance
  17. 31. the SI base unit used to measure the amount of a substance whose number of particles is the same as the number of atoms in 12 g of carbon-12
  18. 32. the number of protons in the nucleus of an atom
  19. 33. energy transferred between objects that are at different temperatures
  20. 37. the energy of an object that is due to the object’s motion
  21. 38. the rate at which a chemical reaction takes place
  22. 40. the process by which an unstable nucleus emits one or more parti- cles or energy in the form of electromagnetic radiation
  23. 41. describes a process in which a system releases heat into the environment
  24. 43. an atom that has the same number of protons (atomic number) as other atoms of the same element but has a different number of neutrons (atomic mass)
  25. 45. a method to determine the concentration of a substance in solution by adding a solution of known volume
  26. 46. describes a process in which heat is absorbed from the environment
  27. 49. an acid that releases few hydrogen ions in aqueous solution
  28. 55. an explanation for some phenomenon that is based on observation, experimentation, and reasoning
  29. 56. the capacity to do work
  30. 59. a subatomic particle that has a positive charge and that is found in the nucleus of an atom