Name __________________________________________ Date



Name: ___________________________________________ Date: ________________________ Mods: _____________CP Chemistry Midterm Review PacketYour Midterm Exam is on ____________________________________________. I have listed the topics we have covered this year thus far. Please start looking over this material. If you break up the topics into small sections and study a little at a time, you will be more prepared than if you wait to the last minute!! I am available for extra help after school. Please let me know if you need any help!! Good Luck!!Topics:Significant figures & scientific notationUnit conversionsPhysical changes and Chemical changes/reactionsQualitative/Quantitative observationsDensityPercent errorElectromagnetic Radiation (speed of light equations)Atomic theory history (JJ Thomson and Ernest Rutherford)Atomic structure (protons, neutrons & electrons)Element name and symbolsIonsIsotopesElectron configuration & dot structuresPeriodic Table & Periodic TrendsNaming & formula writingCalculating formula weightCalculating percent composition by weightBonding types (Ionic, Covalent, Polar, Nonpolar)Chemistry Review Worksheet #1Define the following.Physical change - Chemical change (chemical reaction) - Quantitative observations -Qualitative observations –Precision –Accuracy - Lab Safety.Write down all lab safety procedures that apply to the following scenario:21907540640Flame Test LabProcedure:At each station there is a wooden splint soaking in a known compound.Write down the name of the compound into your data table.Pick up the wooden splint and hold it over the hottest part of the Bunsen burner flame. (This is the center towards the base of the flame. Do NOT touch the wooden splint to the Bunsen burner.)Record the color of the flame in your data table.Replace the wooden splint into the solution.Go to the next station and repeat steps 2-5.Determine which element ion was responsible for the color.Repeat steps 2-5 for the 4 unknown compounds. Record this information under the “Unknown Compounds” in the Data section.00Flame Test LabProcedure:At each station there is a wooden splint soaking in a known compound.Write down the name of the compound into your data table.Pick up the wooden splint and hold it over the hottest part of the Bunsen burner flame. (This is the center towards the base of the flame. Do NOT touch the wooden splint to the Bunsen burner.)Record the color of the flame in your data table.Replace the wooden splint into the solution.Go to the next station and repeat steps 2-5.Determine which element ion was responsible for the color.Repeat steps 2-5 for the 4 unknown compounds. Record this information under the “Unknown Compounds” in the Data section.Applicable Safety Rules to Follow (be sure to number your procedures) :______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Significant Digits. How many significant figures are in each number?1.20__________0.007__________123.400__________7.8 X 1023__________0.20300__________140000__________5.698 x 1.23 __________7.8/1.29__________Scientific Notation. Convert the following between scientific notation and traditional4,200____________________0.000652____________________1.23____________________3.50 x 105____________________9.99 x 10-3____________________2.00 x 10-1____________________Density. Answer the following. Remember to round your answer to the appropriate number of significant figures.An object has a mass of 5.25 g and a volume of 1.2 ml. What is the density?An object has a density of 2.2 g/ml and a mass of 4.9 g. What is the volume?An object has a volume of 3.25 ml and a density of 1.2 g/ml. What is the mass?Percent Error If a student determines the density of a copper object is 8.46 g/ml and the accepted value is 8.96 g/ml, what is the percent error?Unit ConversionsConvert 9,014 kg to gConvert 7.2 L to mLChemistry – Review #2Define.Atom -Ion -Isotope - History.JJ Thomson discovered the negative charge of electrons by what process?Ernest Rutherford conducted the gold foil experiment to disprove Thomson’s plum pudding model. What did he observe that he was able to draw his conclusions from?Atomic Structure.The smallest particle of an element is a(n) _______________________________.___________________ and _______________________ have about the same mass.Fill in the table (parts of an atom)ChargeLocationProtonNeutronElectronFill in the ChartElementIonAtomic NumberAtomic MassMass NumberProtonsNeutronsElectrons2 H+124Mg+239K15N-316O-27Li+1Electron Configuration and Dot DiagramsWrite the electron configuration for Fluorine.Write the electron configuration for Mercury.Identify the following elements by symbol and name:4d10__________________________________________6p2__________________________________________5f3__________________________________________Draw the dot diagram for Chlorine.Draw the dot diagram for Boron. Chemistry Review #3Periodic Table Trends.Label the table with the following:Alkali MetalsHalogensAlkaline Earth MetalsMetalloidsChalcogensLanthanide SeriesTransition MetalsActinide SeriesNoble GasesMetalsNonmetals+1, +2, +3, +/-4, -1, -2, -3s, p, d, f blocksGroupPeriod76200015621000In terms of electron arrangement, which group is chemically un-reactive due to a full outside shell?Which element touching the staircase is not a metalloid? ____________________________Follow the numbers in the boxes of the elements in one group as you trace down the group. What do you notice about the changes in the atomic mass as you go down the group? _____________________________What about the number of electron shells? ______________________________________________502983527940Atomic RadiusAtomic Radius50298351343025Electronegativity0ElectronegativityWhat is the trend for increasing atomic radius?Explain:50298351308735Ionization EnergyIonization EnergyWhat is the trend for increasing electronegativity?Explain:What is the trend for increasing ionization energy?Explain:Formula Writing and Percent Composition. Calculate the formula weight for the following and determine the percent composition for the underlined element:Na2SO4(NH4)3PO4KOHChemistry Review #4Formula writingWrite the formulas for the followingaluminum oxide_______________copper (I) nitrate_______________calcium sulfate_______________chromium (IV) silicide _______________aluminum sulfate_______________aluminum phosphate_______________manganese (II) bromate _______________diboron tetrabromide _______________carbon tetrachloride _______________iodine pentafluoride _______________Write the names for the followingNa2O__________________________________KOH__________________________________(NH4)2SO3__________________________________NH3__________________________________HNO3__________________________________SCl4 __________________________________CH4 __________________________________N2S3 __________________________________CCl4__________________________________H2O__________________________________Bonding.Ionic bonds usually occur between ____________________________ and ____________________________ and involves the sharing/transfer of electrons.Covalent bonds usually occur between ___________________________ and ____________________________ and involves the sharing/transfer of electrons.Match the characteristic/properties with the appropriate type of bonding:Covalent BondsIonic Bonds______Low solubility______Soluble in water______High electronegativity difference______Low electronegativity difference______Does not conduct electricity______Conducts electricity______Low melting point______High melting pointBased on electronegativity, predict if they will form ionic or covalent bonds.Ie. Bromine monoxide 3.5- 2.8 = 0.7 (type of bond)Phosphorus trichloride___________________________________Magnesium fluoride___________________________________Iodine (I2) ___________________________________Rubidium chloride___________________________________Potassium oxide___________________________________Carbon monoxide ___________________________________ ................
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