Chemistry

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  1. 2. a subatomic particle with a net charge that is negative
  2. 5. The amount of matter in an object.
  3. 6. The SI unit of energy defined as a newton-meter
  4. 8. A nuclear reaction where a big atom breaks up into little ones.
  5. 9. A measurement of the average kinetic energy of the particles in a system.
  6. 12. particles that fill their container though have no definite shape or volume
  7. 14. a chemically bonded number of atoms that are electrically neutral
  8. 16. H2O
  9. 20. A state of matter which takes the shape of its container
  10. 22. of conservation of mass The amount of stuff after a chemical reaction takes place is the same as the amount of stuff you started with.
  11. 23. The liquid that dissolves the solid in a solution.
  12. 25. Group II in the periodic table.
  13. 26. point the place where temperature and pressure of three phases are the same
  14. 29. ratio The ratio of moles of what you've been given in a reaction to what you want to find.
  15. 30. When you make a big molecule from two or more smaller ones.
  16. 31. a molecule that has gained or lost one or more electrons
  17. 32. When you haven't yet dissolved all of the solute that's possible to dissolve in a liquid.
  18. 36. particle A radioactive particle equivalent to a helium nucleus.
  19. 37. pair two electrons that aren't involved in chemical bonding.
  20. 38. A measurement of how repeatable a measurement is. The more significant figures the more precise the measurement
  21. 40. A compound that gives off OH- ions in water. They are slippery and bitter and have a pH greater than 7.
  22. 42. When an element has more than one possibility for the number of neutrons, these are called isotopes.
  23. 43. The time required for half of the radioactive atoms in a sample to decay.
  24. 45. bond A bond formed when charge particles stick together.
  25. 46. a positive unit or subatomic particle that has a positive charge
Down
  1. 1. particle A radioactive particle equivalent to an electron.
  2. 3. When a compound combines with oxygen gas to form water heat and carbon dioxide
  3. 4. The mass of one mole of particles.
  4. 7. The recipe that describes what you need to do to make a reaction take place.
  5. 8. number of cycles per unit of time.
  6. 10. High energy light given off during a nuclear process. When a nucleus gives off this light it goes to a lower energy state making it more stable.
  7. 11. chemical bond that involves sharing electrons
  8. 13. This is anything that gives off H+ ions in water. Acids have a pH less than 7 and are good at dissolving metals.
  9. 15. The phase change from a solid to a liquid
  10. 17. When you measure something, the accuracy is how close your measured value is to the real value.
  11. 18. When more solute is dissolved in a liquid than is theoretically possible.
  12. 19. Group I in the periodic table.
  13. 21. electron The outermost electrons in an atom.
  14. 24. When you boil a liquid.
  15. 27. -log[H+]
  16. 28. When the maximum amount of solute is dissolved in a liquid
  17. 33. A measurement of how much of a solute can dissolve in a liquid.
  18. 34. a neutral unit or subatomic particle that has no net charge
  19. 35. level A possible level of energy that an electron can have in an atom.
  20. 38. a carrier of electromagnetic radiation of all wavelength
  21. 39. A unit of concentration equal to moles of solute divided by liters of solution.
  22. 41. A row in the periodic table.
  23. 44. form of ionizing electromagnetic radiation between gamma and UV rays