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SCIENCE 9 Matter REVIEW Name:________________________ Definition/ Concepts Pure Substance Pure Element Pure Compound Mixtures Heterogeneous Homogeneous Atoms Protons Electrons Neutrons Question One Symbol Atomic Number Mg Atomic Mass # Protons # Electrons # Neutrons 24.31 4 9 5 19.00 16 S 14.01 Question Two 1. This word means easily shaped____ 2. Easily stretched into a wire ____ 3. Refers to the ability to conduct electricity____ 4. Made up of tiny cubes or blocks ____ 5. The amount of matter per unit volume ____ 6. This refers to how easily a liquid flows_____ 7. This refers to how easily a liquid dissolves in water___ 7 A. Solubility B. Malleable C. Viscosity D. Conductivity E. Crystal F. Density G. Ductile Question Three Decide whether the following changes are chemical or physical. Also, give an explanation to why. 1. Burning of a Building Physical or Chemical Why:________________________________________________________________________ 2 2. Adding Sugar to Lemonade Physical or Chemical Why:________________________________________________________________________ 3. Water changing to steam Physical or Chemical Why:________________________________________________________________________ 4. Rusting of Iron Physical or Chemical Why:________________________________________________________________________ 5. Leaves changing Colour Physical or Chemical Why:________________________________________________________________________ 6. Milk turning Sour Physical or Chemical Why:________________________________________________________________________ 7. Baking Rolls Physical or Chemical Why:________________________________________________________________________ 8. Ripening of Tomatoes Physical or Chemical Why:________________________________________________________________________ 9. A stick broken in half Physical or Chemical Why:________________________________________________________________________ 10. Gas bubbles Physical or Chemical Why:________________________________________________________________________ Question Four List the 4 signs of a chemical change. 1.______________________________________________________________ 2.______________________________________________________________ 3.______________________________________________________________ 4.______________________________________________________________ Question Five Draw a Bohr diagram for the following elements. A) Na B) C 3 C) F D) Ar Question Eight. Density Questions- Don’t forget to show all your work for full marks. A) The density of wood is 0.62g/cm3. Find the mass of a block of wood 32cm by 5.8cm by 3.6cm. Given: Paraphrase: Required: Analysis: Solution: B) A metal alloy has a mass of 500g and a volume of 75 cm3. What is the density? Given: Required: Analysis: Solution: Paraphrase: 4 C) A block of brass is 8.4 g/cm3. What volume of brass will be needed to make a 500g weight. Given: Paraphrase: Required: Analysis: Solution: Question Nine Counting Atoms Determine the number of each type of element in the compounds below. Be sure to write the full name of the elements along with the number. 1) K2CrO4 2) 4 Al2(CO3)3 Question 10 Groups on the periodic table. 1) Why are noble gases un-reactive? Where are they located on the periodic table? 2) What is a property of alkali metals? Where are they located on the periodic table? Question 11: Classifying Matter Classify the following matter. (Pure Substance or Mixture and then: Element or Compound / Heterogeneous or Homogeneous) A) Chocolate Chip Cookie Dough B) Vanilla Soft Serve Ice Cream 5 C) Diet Coke D) Fluorine (F) E) Carbon Dioxide (CO2) F) Salt dissolved in water (NaCl + H20) G) Uranium (U) Question 12: Atomic Theory Place the following images of atomic models in order of development, one being the first and four being the most current. Also add the name of the scientist or name of the model used. (4) _____ _____ ____ _____