SAMPLE PROBLEM 8.2:
(continued)
(b) for Mo (Z = 42)
1s22s22p63s23p64s23d104p65s14d5
[Kr] 5s14d5
(c) for Pb (Z = 82)
[Xe] 6s24f145d106p2
1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p2
Mo has 36 inner electrons and 6 valence electrons.
Pb has 78 inner electrons and 4 valence electrons.
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