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3. (4 pts) Write the full electron configurations, starting with 1s, for the following atoms or ions (a) N3 (b) Pb 4. (4 pts) Write the abbreviated noble gas electron configurations for the following atoms or ions: (a) P (a) (b) Sn2+ (b) 5. (4 pts) Draw the shapes of the 1s,2ps,2py, and 2pz, crbitals on the axns below: 6. (4 pts) Indieate how many unpaind electrons are there in each of the following atoms or lons: (a) S (a) (b) Ba (b) (c) O2 (c) (d) Ni (d)