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ch2_notes - Chapter 2 Atoms and the Periodic Table 2010...

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©2010 Donald L.Siegel All rights reserved Chapter 2 Chapter 2 Atoms and the Periodic Table
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©2010 Donald L.Siegel All rights reserved The electron The electron W Cathode ray: deflected by magnets and other electromagnetic fields
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©2010 Donald L.Siegel All rights reserved Millikan Oil Drop Millikan Oil Drop W Fine spray of oil W Ionized with x-ray W Balance electric force against gravity W With mass of oil drop, he found the mass to charge ratio
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©2010 Donald L.Siegel All rights reserved Oil Drop Oil Drop Aparatus Aparatus
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©2010 Donald L.Siegel All rights reserved Result Result W Charge on electron comes in discrete units W With the mass to charge ratio already known, he determined that the mass of an electron was 9.11×10 -31 kg
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©2010 Donald L.Siegel All rights reserved Types of Radioactive Decay Types of Radioactive Decay W α -emission Many heavy nuclides eject a helium nucleus, called an alpha particle W β -emission A neutron is actually made of a proton and an electron. A neutron’s decay can result in the emission of an electron. W γ -emission Nuclei have energy levels just like electrons do When a nucleus in an excited state drops to a lower energy level, the energy is carried away by a photon. The photons are called γ -rays
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©2010 Donald L.Siegel All rights reserved Gamma Rays Gamma Rays W Nuclei have energy levels just like electrons do When a nucleus in an excited state drops to a lower energy level, the energy is carried away by a photon.
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This note was uploaded on 02/20/2012 for the course 160 161 taught by Professor Kim during the Fall '08 term at Rutgers.

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ch2_notes - Chapter 2 Atoms and the Periodic Table 2010...

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