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Unformatted text preview: Energy level 3= square 3= 9 orbitals so 18 electrons in that n=3. Ordering of orbitals change for cations because 1 st trans metals row so the 4s is lower E than 3d, but for cations, the ordering is back to normal. S is lower than p because of penetration, p is more shielded Mn= [Ar] 4s^2, 3d^5 Mn^+2= [Ar] 3d^5 U= [Rn] 7s2, 6d1,5f3 U^3+=[Rn] 5f3..for d and f, keep the lower n number for trans cations Hunds rules= fill lower n number or E level, put e- singly into orbitals of same degenerate..these applies to atomic and molecular orbitals ENC= atomic #-core electrons Ge= has 28 core, all orbitals below n=4, 4 valence, 4s2 and 4p2 because the 3d is full so it becomes core X-ray photo spect= same photon of light to remove E from 1s than 2p, so it takes more E to remove from 1s because closer, 2p has more KE b/c a lot of E left over Associate= ENC with x-ray because more charge os protons close to 1s Light and e- for constructive, destructive Para mag and dimag= para is if there are unpaired e- in any MO or AO...
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- Fall '07