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Assessment Review

Assessment Review. Quarter 1 (rev. 1010). Is a chocolate chip cookie a homogeneous or heterogeneous mixture? Ans: heterogeneous mixture. If the density of a ball of metal is 3.52 g/ml and the mass is 15 grams, what is the volume? Ans: 4.26 ml. Determine the number of significant digits:.

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Assessment Review

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  1. Assessment Review Quarter 1 (rev. 1010)

  2. Is a chocolate chip cookie a homogeneous or heterogeneous mixture? • Ans: heterogeneous mixture

  3. If the density of a ball of metal is 3.52 g/ml and the mass is 15 grams, what is the volume? • Ans: 4.26 ml

  4. Determine the number of significant digits: 0.090

  5. Use the following information to determine the density of a ball. If you cut a ball in half and find the density, would you still get the same density answer, or a different answer for density? • Ans: Yes, the density would still be the same.

  6. Determine whether the following is a chemical or physical change. rotting vegetables

  7. Determine whether the following property is a chemical or physical property. boiling point

  8. If the mass of a block of wood is 28 g and the volume is 35 ml, what is the density? • Ans: 0.8 g/ml

  9. Determine whether the following is a chemical or physical change. mowing the lawn

  10. How do you tell the difference between a chemical change and a physical change?

  11. Determine whether the following property is a chemical or physical property. combustibility

  12. Write the definition for the vocab word “element”.

  13. Determine whether the following property is a chemical or physical property. hardness

  14. Determine whether the following property is a chemical or physical property. density

  15. Is a glass of chocolate syrup and milk a homogeneous or heterogeneous mixture? ans: homogeneous

  16. How do you determine the following for an “element”? Mass Number

  17. Determine whether the following is a chemical or physical change. burning toast

  18. How do you determine the following for an “element”? Number of Electrons

  19. Review how to determine the following for an “ion.” Mass Number

  20. List the steps of the Scientific Method

  21. List the scientist’s discovery and experiment (or major accomplishment). Henri Becquerel

  22. Draw a picture of an atom that has 7 protons, 10 electrons and 7 neutrons. • What is the name of the element the you drew? • Does your drawing represent a neutral atom or an ion?

  23. List the three types of radioactive decay

  24. Review how to determine the following for an “ion.” Atomic Mass

  25. How could you protect yourself from each type of radiation?

  26. Write the complete symbol for each type of nuclear decay.

  27. List appropriate units for the following: a. mass ________ b. volume ________ c. density ________

  28. List the scientist’s discovery and experiment (or major accomplishment). Ernest Rutherford

  29. Review how to determine the following for an “ion.” Number of Protons

  30. List the scientist’s discovery and experiment (or major accomplishment). J.J. Thompson

  31. List the scientist’s discovery and experiment (or major accomplishment). Robert Millikan

  32. List the scientist’s discovery and experiment (or major accomplishment). John Dalton

  33. Review how to determine the following for an “ion.” Number of Neutrons

  34. Scientist Answers • Ernest Rutherford • Gold Foil Experiment, determined that an atom’s positive charge (& most of the mass) are concentrated in the nucleus • J.J. Thompson • Plum Pudding model of atom, called neg particles electrons • Robert Millikan • Oil Drop Experiment, measured the charge of an e-

  35. Scientist Answers • Henri Becquerel • Discovered uranium exhibits radioactivity • Henry Moseley • Determined an atom’s identity comes from the number of p+ in its nucleus. • John Dalton • Atomic Theory of Matter

  36. Convert the following: 440 cm to meters ________ Ans: 4.4 m

  37. Convert the following: 70099 mm to kilometers _______ Ans: 0.070099 km

  38. 2.54 cm = 1 in 305 m = ________ inches Ans: 12007.9 in

  39. List the SI units for • length ________ • temperature ________ • mass ________ • Ans: m, K, Kg

  40. Half Life (Remember the licorice lab?) • If you have 40 grams of substance “X” and it has a half-life of 25 years, how much will you have left after 125 years? • Ans: 1.25 grams

  41. Determine the number of significant digits: 0.20001

  42. What is the definition of fission?

  43. Draw a Bohr model picture of O-2 • Show the correct number of: • Protons • Neutrons • Electrons

  44. Draw a Bohr model picture of Be+2 • Show the correct number of: • Protons • Neutrons • Electrons

  45. What is the definition of fusion?

  46. Determine the number of significant digits: 902.0

  47. Determine the number of significant digits: 602

  48. What is the main difference between one isotope of chlorine and another isotope of chlorine?

  49. Normal Atom, Ion, Isotope Os Mass #: 192 # of protons: 76 # of neutrons: 116 # of electrons: 76 Ans: **********

  50. Determine whether the following is a chemical or physical change. breaking a glass

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