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Wavelength – λ – distance between successive points on a wave (crest to crest)
Amplitude – vertical distance fro the midline of a wave to the peak or trough
Frequency - ν – number of waves that pass a point in 1 second Hz = cycles per second
Speed of a wave u = λ ν Problem page 248 Calculate the frequency (in Hz) of a wave whose speed and wavelength are 713 m/s and 1.14 m, respectively.
Electromagnetic SpectraElectromagnetic waves Travel at the speed of light = 3.00 x 108 m/s or 186,000 mi/s ν = c / λ
Problem page 249 What is the wavelength (in meters) of an electromagnetic wave whose frequency is 3.64 x 107 Hz?
Planck’s quantum theoryQuantum – the smallest quantity of energy that can be emitted or absorbed in the form of electromagnetic radiation. E = hν h = planck’s constant = 6.63 x J s
Planck’s quantum theoryEnergy is always emitted in multiples of hν… 2 hν…. 3 hν
Problem page 252 The energy of a photon is 5.87 x What is its wavelength in nanometers?
Quantum Theory and the Electronic Structure of Atoms
The Rutherford model of the atom was an improvement over previous models, but it was incomplete. J. J. Thomson’s “plum pudding” model, in which electrons.
Inorganic chemistry Assistance Lecturer Amjad Ahmed Jumaa Calculating the number of atoms in a given amount of a compound. Calculating.
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Electrons as Waves.
Radiant Energy Objectives: 1. Describe a wave in terms of its frequency, speed, and amplitude. 2. Identify the major regions of the electromagnetic spectrum.
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CHEMISTRY 161 Chapter 7 Quantum Theory and Electronic Structure of the Atom
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Light and the Electromagnetic Spectrum. Light Phenomenon Light can behave like a wave or like a particle A “particle” of light is called a photon.
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Electron Behavior Electron absorb energy and jump to higher energy level (Excited State). Immediately fall back to original level (Ground State) emitting.
Facts about photons PHOTONS n Smallest quantity of electromagnetic radiation n bundle of energy (AKA quantum) n travels at 186,400 miles per second n.
Energy. Radiant Energy Radiant: think light…. How does light carry energy through space???
Light and Quantized Energy Chapter 5 Section 1. Wave Nature of Light Electromagnetic radiation is a form of energy that exhibits wavelike behavior as.
Section 11.1 Atoms and Energy 1.To review Rutherford’s model of the atom 2.To explore the nature of electromagnetic radiation 3.To see how atoms emit light.
Quantum Theory and the Electronic Structure of Atoms Chapter 7 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
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