CH110 Lecture 9: Ch110 lecture 9
Document Summary
Extra stability of filled and half-filled sets of degenerate orbitals. Place electrons in the ns orbital before the (n 1)d orbital. Place electrons in the (n 1)d orbital before the ns orbital. Problem: write the ground-state electron configuration, in shorthand notation, for each of the following. (a) phosphorus (p) (b) manganese (mn) (c) gallium (ga) (d) i(1 ) anion (i ) (e) iron (fe) (f) iron(ii) ion (fe2+) Determine the number of electrons in the atom or ion. For a neutral atom z = #e . Add electrons for anions (add 1e for each negative charge on the anion) Subtract electrons for cations (subtract 1e for each positive charge on the cation) step 2. For neutral atoms and anions, place electron in ns orbital before (n 1)d orbitals. For cations, place electrons in (n 1)d orbitals before ns orbital step 3. Check for exceptions and correct the configuration if necessary.
