Mary J. Bojan Quantum Numbers 2. Azimuthal quantum # ( ) Use symbols rather than numbers for = 0 1 2 3 20 Chem 110
Mary J. Bojan Quantum numbers 3. Magnetic quantum number (m ) 21 21 Chem 110
Mary J. Bojan Chem 110 22 Summary Orbitals: • Allowed energy states for electrons in atom. • Describes spatial distribution of electrons in these energy states. Orbital number shape name of orbitals? ___________________________________________________________________________________ s 1 spherical p 3 dumbell d 5 clover leaf f 7 ?!?!? Quantum Numbers: defines n principal size azimuthal shape m magnetic orientation
Mary J. Bojan Chem 110 23 Shells, Subshells & Orbitals n 2 = number of states = number of orbitals in the n th shell. Subshells # of orbitals 1s 2s 2p 3s 3p 3d 4s 4p 4d 4f # orbitals in each subshell
Mary J. Bojan Chem 110 24 Shells, Subshells & Orbitals Shell : defined by quantum number Subshell : defined by quantum numbers Example: 3s (n = 3, = 0) 2p (n = 2, = 1) Orbital : defined by quantum numbers Example: 2p x (n = 2, = 1) 2p y (n = 2, = 1) 2p z (n = 2, = 1) and m = –1, 0, 1 when = 1 Note: All of these have the SAME energy. Orbitals of the same subshell have the same energy: they are degenerate
Mary J. Bojan By Monday Sept 5 No Class on Labor Day (Sept. 5) You should have read Chapter 6 sections 1-6. Text Problems: 6: 33, 39, 54 Supplemental Chapter 6: 6-9 Complete Objective 2 in ALEKS (Dues Tues. Sept. 6) After Objective 2 you will be given a progress assessment in ALEKs. Chem 110 25
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