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1Week 5 CHEM 1310 - Sections L and M 1Exam 1 Results4 Perfect Scores! Average = 6712%14%22%23%27%2%Week 5 CHEM 1310 - Sections L and M 2Exam 1 ScoreLook up Score– Via WebCT: One point already added toScanTron™ score!– Via Lecture Notes Link: Correct Score ListedPapers returned in lab this FriWeek 5 CHEM 1310 - Sections L and M 3Content RecapATOMSMOLECULES IONSBondingBondingStates of MatterGases, Liquids, Solids2Week 5 CHEM 1310 - Sections L and M 4Content RecapATOMSMOLECULES IONSBondingBondingHow do moleculesinteract with eachother to form liquidsand solids?Quantum MechanicsHow does bondingoccur on themolecular level?Week 5 CHEM 1310 - Sections L and M 5Mon| Sep 17, 2007 Chapter 12: Quantum Mechanics & AtomicTheory– 12.1 Electromagnetic Radiation– 12.2 The Nature of Matter– 12.3 The Atomic Spectrum of Hydrogen– 12.4 The Bohr Model– 12.5 Quantum Mechanical Description of an Atom– 12.6 SKIP THIS SECTIONWhat is quantum mechanics?Why study electromagnetic radiation to understand it?Week 5 CHEM 1310 - Sections L and M 6What is Quantum Mechanics?Scanning Tunneling Microscopy1986 Nobel Prize in PhysicsClassical MechanicsF = m x aOnly applies to“big” objects!Quantum mechanics is a field of study that describes the motion of “small” objects (i.e. subatomic particles).3Week 5 CHEM 1310 - Sections L and M 7What is Quantum Mechanics?Bonding– Occurs through movement in electrons– Must understand how electrons moveQuantum Mechanics– Small objects (such as light and electrons) moveaccording to rules of quantum physics– “Quantum” = small packet of radiation that exhibits adiscrete amount of energyHow can we describe quanta, or radiation? Week 5 CHEM 1310 - Sections L and M 8Electromagnetic RadiationForms of Energy– Kinetic– Potential Modes of Energy Transfer– Light (or Radiation)– Heat (Enthalpy - Chapter 9)Week 5 CHEM 1310 - Sections L and M 92 Views of LightFrequency vs. WavelengthAmplitudeAmplitudeTime, sλ, nm4Week 5 CHEM 1310 - Sections L and M 10Electromagnetic Radiationλ ν = cλ = “lambda”ν = “nu” = frequencyWeek 5 CHEM 1310 - Sections L and M 11Frequencyλ ν = cUnits of Frequencycycles/sec = hertzNotice how λ changes with νWeek 5 CHEM 1310 - Sections L and M 12Electromagnetic SpectrumV - I - B - G - Y - O - R5Week 5 CHEM 1310 - Sections L and M 13Dual Nature of Quantum MatterDual nature of light: wave and particulate nature of EM radiationEphoton = h ν =h


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