Part J Electronic Configuration, Periodic Table and periodic trends 4 slides per page

A group refers to all elements having the same number

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Unformatted text preview: u assigment before a new s orbital is filled up. • A “group” refers to all elements having the same number of electrons occupying the same valence orbitals (or simply having the same valence electrons) Writing Electronic Configurations • What about the transition metals? There is special stability associated with half-filled orbitals 4 1/28/2014 Quantum Numbers Electronic Configuration • principal quantum # n: 1, 2, 3, 4.... main period • angular momentum # l: l = 0, 1, 2, 3, .......(n-1) l = s, p, d, f, .......(n-1) orbital shape • magnetic quantum # ml the shape where e- is placed ml = - l , (- l + 1), (- l +2), .....0, ......., (l -2), (l -1), l There is special stability associated with completely filled orbitals • spin quantum # ml ms = +1/2 or -1/2 • Consider sodium, Na spin-up (+1/2) or spin-down (-1/2) EDQ • Write the expanded electronic configuration of (i) Mg (ii) Mg2+ • Write the quantum numbers for the last entering electron of (i) Cu (ii) Cu2+ • Give the expanded and condensed electronic configurations of the atoms in the following species: – Fe in K3[Fe(CN)6] – Zn in [Zn(OH)4]2– Pb in PbC2O4 5 1/28/2014 Chemical Periodicity • Establish a...
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