Fill in the chart below:

$\backslash$table$[[$Symbol$,$#$e^{-},$Shorthand Electron Configuration$],[Ca,,],[Pb,,],[F,,],[U,,]]$

Identify the element

$\backslash$table$[[$Electron Configuration,Element$],[$a$)1s^{2}2s^{2}2p^{6}3s^1,],[$b$)1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^3,],[$c$)1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^6,],[$d$)1s^2,]]$

What is wrong with the electron configurations$/$energy level diagrams below? Fill in the table.