P219lecture23atoms - Goal To understand the atom Objectives...

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Goal: To understand the atom Objectives: 1) To learn that The basics of Atomic Physics isn’t so bad 2) To understand the Bohr atom 3) To understand Electron energy levels 4) To understand how energy levels lead to Absorption and emission 5) To learn about the Electron shell radius 6) To apply 3-5 to Bigger atoms
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Atomic Physics Just like with relativity, the basics isn’t too bad. It does get a lot more complicated when you add in the small details, but we won’t do that. An atom consists of a nucleus + electron shells. The nucleus has protons and neutrons and is about 10 -14 m in size. The electron shells might have electrons. The shell closest to the nucleus is called the ground state.
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Bohr Atom The Bohr Atom is the most basic atom. It is basically a Hydrogen atom. It consists of 1 proton and 1 electron. The electron orbits around the proton in a shell – often times the ground state shell. Each other shell is further away. Each is assigned a number. The ground state is n=1, and they go to n = infinity.
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Energy Levels The electron has energy levels. Just like with orbits the closer to the nucleus the lower the energy.
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