L37 - Orbital energy diagram for a potassium atom (Z=19)...

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Lecture 37 Breaking the Code: Periodic Table Key Idea: Periodic properties of the atoms can be understood in terms of the locations of the electrons. Orbital energy diagram for a potassium atom (Z=19) 3s 3p 2s 1s 4s 2p 4p 3d Energy n = 2 l = 1 m l = –1 m s = –1/2 n = 4 l = 0 m l = 0 m s = –1/2 n = 2 l = 1 m l = +1 m s = +1/2 Each electron has a specific set of 4 quantum #’s 4s fills before 3d Orbital energies change with Z Subshell Blocks # of Electrons in Shells and Subshells 14 4f 10 4d 6 4p 32 n=4 2 4s 10 3d 6 3p 18 n=3 2 3s 6 2p 2 2s 8 n=2 2 1s 2 n=1 # of electrons in the subshell subshell # of electrons in the shell shell l = 0,1 l = 0,1,2 l = 0,1,2,3 m l = -3,-2,-1,0,+1,+2,+3 Electron Configurations DOWN beryllium Be [He] 2s 2 magnesium Mg [Ne] 3s 2 calcium Ca [Ar] 4s 2 strontium Sr [Kr] 5s 2 barium Ba [Xe] 6s 2 Iron (Z=26) 1s 2 2s 2 2p 6 3s 2 3p 6 3d 6 4s 2 ACROSS sodium Na [Ne] 3s 1 magnesium Mg [Ne] 3s 2 aluminum Al [Ne] 3s 2 3p 1 silicon Si [Ne] 3s 2 3p 2 phosphorus
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L37 - Orbital energy diagram for a potassium atom (Z=19)...

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