Subshells and Orbitals (68)

Subshells and - Subshells and Orbitals Timberlake LecturePLUS 2000 Quantum Mechanics Describes the arrangement of electrons in atoms in terms of

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Timberlake LecturePLUS 2000 Subshells and Orbitals
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Timberlake LecturePLUS 2000 Quantum Mechanics Describes the arrangement of electrons in atoms in terms of: Main or principal energy levels (n) Energy subshells Orbitals (space occupied within the atom)
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Timberlake LecturePLUS 2000 Principal Energy Levels (n) Contain electrons that are Close in energy Similar distance from nucleus Have values of n = 1, 2, 3, 4, 5, 6…. . Maximum number of electrons = 2n 2 n =1 2(1) 2 = 2 n =2 2(2) 2 =8 n=3
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Timberlake LecturePLUS 2000 Energy Levels (Shells) A group of electrons in an atom all having the same principal quantum number (n) n = 1, 2, 3, … The first shell (n = 1) is lowest in energy, 2 nd level next and so on 1<2<3<4 The number of electron in each shell is limited to 2n 2 n = 1 2n 2 = 2 n = 2 2n 2 = ____
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Timberlake LecturePLUS 2000 Energy Levels for Electrons Some possible electron transitions for the first three energy levels are shown below. The negative value means that the electron in the atom has a lower energy than a free electron Energy Level Energy, E n=3 ___________________ (-) 2.420 x 10 - 19 J n=2 __________________ (-) 5.445 x 10 - 19 J n=1 __________________ (-) 2.178 x 10 - 18 J
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Learning Check S1 A. What energy change (J) takes place when an electron in a hydrogen atom moves from the first (n=1) to the second shell (n=2)? B.
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This note was uploaded on 11/09/2011 for the course CHEM 100 taught by Professor Sdfsdf during the Winter '08 term at BYU.

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Subshells and - Subshells and Orbitals Timberlake LecturePLUS 2000 Quantum Mechanics Describes the arrangement of electrons in atoms in terms of

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