What is the ground state electronic configuration of Pb ?

The ground state electronic configuration of lead (Pb) can be determined by referring to the periodic table. Lead (Pb) has an atomic number of 82.

The electronic configuration of an atom describes the distribution of its electrons among the various atomic orbitals. For lead (Pb), the ground state electronic configuration can be written using the Aufbau principle, which states that electrons fill atomic orbitals starting from the lowest energy level to the highest.

Following this principle, the ground state electronic configuration of lead (Pb) can be written as:

1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 5d¹⁰ 6s² 6p²

So, the ground state electronic configuration of lead (Pb) is:

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p²

The notation "[Xe]" indicates the configuration of the noble gas xenon that comes before lead (Pb) in the periodic table, representing the filled inner electron shells. The remaining electrons, accounting for 82 - 54 = 28 electrons, are distributed among the outer shells, leading to the configuration above.