Give the full and condensed electron configurations, partial orbital diagrams showing valence electrons only and number of inner electrons for the following elements
K (Z = 19)
Tc (Z = 43)
Pb (Z = 82)
K = 1s1 2s2 2p6 3s2 3p6 4s1 ([Ar] 4s1) 1 valence electron, 18 inner electrons
Tc = 1s1 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 d5 ([5s2 4d5]) 7 valence electrons and 36 inner electrons)
Pb = [Xe] 6s2 4f14 5d10 6p2 4 valence and 78 inner electrons