Worksheet2_AtomsFormulasNamesMoles

Worksheet2_AtomsFormulasNamesMoles - Chem142,Autumn2011

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Unformatted text preview: Chem142,Autumn2011 Name______________________ 1. A.Whichparticlescontributemostofthemasstotheatom,andwherearethese particleslocated? B.Whichparticlescontributemosttothevolumeorsizeoftheatom,andwhereare theseparticleslocated? C.Whatinformationisprovidedbytheatomicnumber,Z,whichisthesubscriptin thenuclearsymbol? D.Whatinformationisprovidedbythemassnumber,A,whichisthesuperscriptin thenuclearsymbol? F.Ingeneral,whatfeatureofanatomidentifiesitasaparticularelement? E.Insertthemissinginformationinthefollowingtable.Thefirstrowiscompleted foryouasanexample. Name Symbol Z A # of neutrons # of electrons boron10 oxygen16 10 + Group Activity 2: Atomic Structure, Atoms and Ions, Naming Compounds 5 B 5 9 10 19 39 5 20 4 18 8 10 19 40 20 Ca2+ 1of4 Chem142,Autumn2011 Name_____________________________ 2.A.Foreachatomicsymbolbelow,writethename;foreachname,writethe symbol. Symbol Name P potassium Cl zinc Fe bromine B.Indicatewhichion(s)thefollowingelementsusuallyform. Symbol Ion(s) Na S Ca F Cu C.Indicatethetypeofbond(ionicorcovalent)expectedineachofthefollowing compounds. Compound Type of Bond KCl SO2 Cl2O7 MgO Na3PO4 2of4 Chem142,Autumn2011 Name_____________________________ 3. Fillinthetablesbyprovidingthenamesorformulasforthecompounds. Formula Name KCl SO2 Cl2O7 NaF MgO Na3PO4 AlCl3 Mg3N2 CCl4 CS2 Formula CuO K2CO3 PbO2 H2SO4 Name iron(III)nitrate cobalt(III)chloride phosphoruspentoxide hydrobromicacid 3of4 Chem142,Autumn2011 Name_____________________________ 4.A.HowmanygramsofMg3N2arein0.74molesMg3N2. B.HowmanymolesofK2CO3arein25.3gramsofK2CO3? C.HowmanygramsofKareintheabovesampleofK2CO3? D.HowmanyatomsofoxygenareintheabovesampleofK2CO3? 5.WhatisthemassofChlorine,whichhastwostableisotopes:35Cl,75.8%withamass of35.0amuand37Cl,24.2%withamassof37.0amu? 4of4 ...
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