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Assessment #1 Review Sheet 1. Name:__________________ Types of Matter Label each substance as an: element, compound, homogeneous mixture (solution), or heterogeneous mixture: a. Chocolate chip cookie _________________________ e. Magnesium chloride __________________________ b. Kool-Aid ___________________________________ f. Carbon dioxide ______________________________ c. Silver ______________________________________ g. Chlorine ___________________________________ d. Salt ________________________________________ h. Dirt _______________________________________ 2. Chemical Vs. Physical Changes and Properties Label each as a chemical change, a physical change, a chemical property, or a physical property. a. Reacts with oxygen _____________________________d. Easily rusts ___________________________________ b. A penny turns green ____________________________e. dissolving sugar _______________________________ c. Acid rain reacts with limestone____________________f. melting an ice cube _____________________________ 3. Symbol 18 O Atomic Structure atomic number atomic mass xxx Mass Number # of protons # of neutrons # of electrons Pb+1 Fe Al+3 Se-2 4. Scientific Method: Define the following terms: a. Law:_________________________________________________________________ b. Theory: ______________________________________________________________ c. Hypothesis:____________________________________________________________ d. Scientific Method:_______________________________________________________ 5. Precision Vs. Accuracy If an accepted value is 15.0 g, give an example data set that is: e. accurate and precise _____________________________________ f. accurate, but not precise __________________________________ g. precise, but not accurate __________________________________ h. neither accurate nor precise _______________________________ 6. Scientists Fill in the table with what particle/concept the scientist discovered, what experiment he used to make his discovery and draw a picture of his model of the atom. Name Discovery John Dalton Experiment Model of the Atom xxxxx Ernest Rutherford J.J. Thomson Xxxxxx Xxxxxxx Niels Bohr 7. SI Units Quantity Unit Abbreviation Mass Length Temperature Volume 8. Conversions/Dimensional Analysis Samantha is trying to make a dog house. Her directions tell her to measure a piece of wood 2.4 ft long, but she only has a meter stick. If 1 meter = 3.28 ft, solve the following conversions. (Show all work) i. How many meters are in 2.4 ft? j. How many cm are in 2.4 ft? k. How many km are in 456 cm? 9. Ions vs. Atoms vs. Isotopes Label each column as an ion, neutral atom, or isotope. a. b. c. # of Protons = electrons # of Protons ≠ # of electrons # of Protons = # of electrons Get all info from periodic table Use charge to find # of electrons Has different number of neutrons and a different mass 10. Fill in the chart. Element Mass Number Number of Protons Number of Neutrons Number of Electrons Os 192 76 116 76 Po 210 84 126 84 Fe 57 26 31 24 Normal Atom, Ion, Isotope Charge (Show chemical symbol and charge) 11. Density a. If a 4.5 g piece of aluminum has a density of 2.70 g/mL, what is its volume? b. If you drop 5 pennies into a graduated cylinder that had an original volume of 10.0 mL and then it has a final volume of 17.5 mL, and the pennies have a mass of 22.0 g, what is the density of the copper pennies? 12. Specific Heat: Calculate the specific heat when 587 J of energy are transferred to a 5.0 g sample to raise its temperature from 344 K to 389 K. The specific heat of glass is 0.20 J/gK. Calculate the amount of energy transferred when a 14.0 g sample is heated from 174 K to 314 K. 13. Scientific Notation Write the following numbers in proper scientific notation. a. 5008 ______________ b. 47.2 ______________ c. 0.0094 ______________ d. Calculate the following and express to the correct # of sig figs: (4.50 x 109) x (8.1 x 108) =________________ (2.7 x 1025) (4.5 x 1058) =__________________ (5.37 x 1012) x (2.0 x 10-8) =_________________ (8.4 x 1033) (3.01 x 1012) = _________________ 14. Significant Digits 15. Temp. Conv. How many significant figures are in the following numbers? Convert these temperatures 1) 5210 __________ 1) 56 oC = ________K 2) 0.003500 __________ 2) 314 K = _______oC 3) 22.00900 ___________ 4) 0.09093 __________ 16. Compare Solids, Liquids, and Gases Solids Liquids Gases 17. Vocabulary: Define: a. endothermic: ___________________________________________________________ b. exothermic:_____________________________________________________________ c. heat: __________________________________________________________________ d. temperature: ____________________________________________________________ e. energy:_________________________________________________________________ f. Law of Conservation of Mass and Energy: _____________________________________ _________________________________________________________________________