Final answer:
The correct noble gas notation for the electron configuration of lead (Pb) is [Xe] 6s² 4f¹⁴ 5d¹⁰, representing the inner electrons up to xenon and the valence electrons of lead.
Step-by-step explanation:
To write the electron configuration of lead (Pb) using noble gas notation, one must first identify the nearest noble gas of lower atomic number, which is xenon (Xe). Lead has the atomic number 82, so the electron configuration that follows Xe should account for the remaining electrons. Considering the question provided, the correct notation to replace in a full electron configuration would be option b. [Xe] 6s² 4f¹⁴ 5d¹⁰, which accounts for the inner electrons up to xenon followed by the configuration that represents lead's valence electrons.