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Chemistry

Chemistry. Semester Exam Review. Identify the following as physical or chemical properties. Color Melting point Density Ability to rust. Identify the following as Pure substance or Mixture. Iron Iron Oxide Air Chocolate chip ice cream Water Oxygen Soil

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Chemistry

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  1. Chemistry Semester Exam Review

  2. Identify the following as physical or chemical properties Color Melting point Density Ability to rust

  3. Identify the following as Pure substance or Mixture Iron Iron Oxide Air Chocolate chip ice cream Water Oxygen Soil • For each substance you identified as a mixture-determine if it is homogeneous or heterogeneous

  4. Identify the following as a solution, suspension or colloid Fog Medicine that says “shake before using” Kool aidesalt water Pond water

  5. Identify how each mixture could be separated • Salt, sand and water • Cherry coke

  6. CH4 + 2O2 CO2 +2H2O • What are the reactants? • What are the products? • The red (2) is known as the ___ • The purple (2) is known as the ____ • The mass of reactants = mass of products. This is known as the ____ • CH4 + 2O2 CO2 +2H2O 15 g 2 g 8.5 g ____ g

  7. Express the following in Scientific Notation • 5239 km • 168 m • 1 million atoms

  8. The closeness of a measurement to the true value is___ • The reproducability of values; how close several measured values are to one another___ • The difference between experimental and accepted value is ___ • The accepted value for the density of an object is 8.0 g/cm3. A student does measures the density and calculates it as 8.5 g/cm3. What is the percent error?

  9. How many meters are in 3.5 cm? • How many μg are in 2 grams? • How many cm are in .0075 m? • What is the density of an object with a mass of 8 grams and a volume of 4 cm3? • What is the mass of an object with a density of 4 g/cm3 and a volume of 1 cm3

  10. The atomic number tells the number of ___ • The mass number tells the number of ___ • The atomic mass represents the ___ • The difference between C-12 and C-14 is___ • What is the mass and charge of a proton, neutron, electron? • How many p, n, e in Mg? 26Al 13

  11. Electron Configuration • The period number indicates the number of _ • The family number indicates the number of __ • What sublevels are in the 3rd principal energy level? • How many valence electrons in F? • Electron configuration of Fe

  12. Electron Configuration • Electron configuration of Mg ion • If electrons have the lowest possible energies, the atom is in the ___ • Classify the element based on electron configuration 1s2 2s2 2p6 3s2 3p6 4s23d4 Representative element Noble gas Rate earth metal Transition metal

  13. Circle the correct answer • Largest atomic radius ( F, Cl, Br, ) ( Na, Al , Cl) • Highest Ionization Energy (Li, Na, K) (Li, C, O) • Greatest Electronegativity (O, S, Se) ( K, Ca, Br) • Highest Boiling Point ( Na, Si, Cl)

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