Basic Chemistry

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Across
  1. 3. A radioactive isotope that emits radiation during decay (p. 28).
  2. 7. A reaction that breaks chemical bonds by adding water (p. 38).
  3. 9. A space region around the nucleus where electrons are likely to be found (p. 26).
  4. 12. Reaction A reaction where a compound breaks down into simpler substances (p. 36).
  5. 13. Energy Energy of motion (p. 24).
  6. 16. Bond A bond is formed by sharing electrons between atoms (p. 32).
  7. 18. A positively charged particle in the nucleus (p. 25).
  8. 20. The substance that dissolves the solute in a solution (p. 29).
  9. 23. A negatively charged particle outside the nucleus (p. 25).
  10. 24. Reaction A reaction that releases energy (p. 37).
  11. 27. The smallest unit of a compound with its properties (p. 28).
  12. 28. A homogeneous mixture of substances (p. 29).
  13. 29. Number The number of protons and neutrons in an atom’s nucleus (p. 27).
  14. 31. The capacity to do work or cause change (p. 24).
  15. 32. A substance that cannot be chemically broken down further (p. 25).
  16. 33. The amount of a substance in a given volume (p. 37).
  17. 36. An element that tends to lose electrons and form positive ions (p. 34).
  18. 39. A negatively charged ion (p. 32).
  19. 40. Physical combinations of substances not chemically bonded (p. 29).
  20. 42. A positively charged ion (p. 32).
  21. 43. Table A chart of elements arranged by atomic number, showing repeating properties (p. 25).
  22. 45. A substance that reduces hydrogen ion concentration (p. 39).
  23. 46. Energy Stored energy (p. 24).
  24. 47. A substance that increases hydrogen ion concentration (p. 39).
Down
  1. 1. Bond The force holding atoms together in molecules or compounds (p. 31).
  2. 2. A substance that speeds up a reaction without being consumed (p. 38).
  3. 4. The smallest unit of matter retaining element properties (p. 25).
  4. 5. A mixture of large particles that settle out over time (p. 30).
  5. 6. A reaction where a compound breaks into simpler substances (p. 36).
  6. 8. The loss of electrons from a substance (p. 36).
  7. 10. An atom’s tendency to attract electrons in a bond (p. 34).
  8. 11. A substance formed from two or more chemically bonded elements (p. 28).
  9. 14. A solution that resists pH changes (p. 41).
  10. 15. Reaction A reaction where parts of two reactants are exchanged to form new products (p. 36).
  11. 17. Bond A weak bond between a proton in one molecule and an electronegative atom in another (p. 34).
  12. 19. Energy The minimum energy required to start a reaction (p. 52).
  13. 21. Shell The outermost electron shell of an atom (p. 31).
  14. 22. Reaction A reaction that absorbs energy (p. 37).
  15. 24. A biological catalyst that speeds up reactions (p. 51).
  16. 25. Reaction A process that transforms one set of chemicals into another (p. 35).
  17. 26. Substances that change in a chemical reaction (p. 35).
  18. 30. Reaction A reaction where two or more substances form a new compound (p. 36).
  19. 34. An atom or molecule with an electric charge due to lost or gained electrons (p. 32).
  20. 35. Number The number of protons in an atom's nucleus (p. 27).
  21. 37. Energy Energy that travels in waves (e.g., light) (p. 24).
  22. 38. Atoms of the same element with different neutron numbers (p. 27).
  23. 41. Anything with mass and volume (p. 24).
  24. 43. Substances formed by a chemical reaction (p. 35).
  25. 44. A mixture with small particles that stay dispersed and don’t settle out (p. 30).
  26. 46. A measure of a solution's acidity or basicity (p. 40).