Notes for Exam 2 Info

Notes for Exam 2 Info - Valence Electrons of (s-, p-, and...

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Unformatted text preview: Valence Electrons of (s-, p-, and d-blocks) 1 1 2 3 4 5 6 7 ns 1 ns 2 (n-1)d 1 ns 2 (n-1)d 2 ns 2 (n-1)d 3 ns 2 (n-1)d 5 ns 1 (n-1)d 5 ns 2 (n-1)d 6 ns 2 (n-1)d 7 ns 2 (n-1)d 8 ns 2 (n-1)d 10 ns 1 (n-1)d 10 ns 2 ns 2 np 1 ns 2 np 2 ns 2 np 3 ns 2 np 4 ns 2 np 5 ns 2 np 6 n f-Block (See Other Side) d-Block p-Block s-Block 1 2 3 4 5 6 7 8 9 11 12 13 14 15 16 17 18 10 Valence Electrons (f-block) Seems like you dont have to know for the exam 2 6 7 (n-2)f 1 (n-1)d 1 ns 2 (n-2)f 2 (n-1)d 1 ns 2 (n-2)f 3 (n-1)d 1 ns 2 (n-2)f 4 (n-1)d 1 ns 2 (n-2)f 5 (n-1)d 1 ns 2 (n-2)f 6 (n-1)d 1 ns 2 (n-2)f 7 (n-1)d 1 ns 2 (n-2)f 8 (n-1)d 1 ns 2 (n-2)f 9 (n-1)d 1 ns 2 (n-2)f 10 (n-1)d 1 ns 2 (n-2)f 11 (n-1)d 1 ns 2 (n-2)f 12 (n-1)d 1 ns 2 (n-2)f 13 (n-1)d 1 ns 2 (n-2)f 14 (n-1)d 1 ns 2 n Key: a) Group numbers 1 to 18 for main group (s- and p- block) and transition metals (d-block). b) No group number for Inner transient metals (i.e. f-block aka Lanthanides and Actinides). c) n = period number. Follows across a row. d) Above each group is the valence electron configuration for that group. The value n corresponds to the period that element is in. . f-Block Quantum Numbers 3 Electron Configuration Principles- Aufbau electrons added to the lowest energy atomic orbitals. For anyone who watched GI.Joe Rise of Cobra over the summer, you may remember Scarlet was reading a book called The Aufbau Principle. I am sure it was pretty boring. Correct Incorrect Correct Incorrect- Pauli Exclusion two electrons in an atom cannot have the same set of quantum numbers. Correct Incorrect Quantum numbers for the purple arrow : Quantum numbers for the purple arrow : n = 1, l = 0, m l = 0, m s = -1/2 n = 1, l = 0, m l = 0, m s = -1/2 Quantum number for the green arrow : Quantum number for the green arrow : n = 1, l = 0, m l = 0, m s = +1/2 n = 1, l = 0, m l = 0, m s = -1/2 Both the purple and green arrows have the same set of quantum numbers.- Hunds Rule if multiple orbitals with the same energy (i.e. the same shell (n) and subshell ( l ), then electrons will occupy an unoccupied orbital before doubling up in an orbital. Correct Incorrect Filling Electron Configuration Electrons fill up: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 6p 6 7s 2 But can be written in order of shell: 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 2 4p 6 4d 10 4f 14 5s 2 5d 10 5p 6 6s 2 6p 6 Exceptions Transition Metal groups 6 and 11. We would expect Cu to be 1s 2 2s 2 2p 6 3s 2 3p 6 3d 9 4s 2 Yet it is actually 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 1 . Read text and lecture notes for explanation. Use periodic table as guide to help you. Notice also the periodic table itself is a guide b/c everything fits in....
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This note was uploaded on 10/03/2010 for the course CHE 131 taught by Professor Kerber during the Summer '08 term at SUNY Stony Brook.

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Notes for Exam 2 Info - Valence Electrons of (s-, p-, and...

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