How can I construct the "Electron Configuration" of an element?Using "the "Energy Content of Atomic Orbitals"

The Electron Configuration of any given element follows
precise rules regarding the placement of electrons around the atom's nucleus. Each
electron follows a path around the center of the atom, or more precisely, each electron
can be said to inhabit a particular "shell" loosely understood to mean a particular
"cloud" layer around the center. These are designated by the undescriptive names of s,
p, d, and f, which correspond to the energy levels of electrons moving about the
nucleus. The term "orbital" refers to the way a particular electron is moving within a
particular shell. For the element Hydrogen, there's one electron moving about the "s"
shell; that electron's designation is therefore 1s1, which means "one electron in the
1s-orbital."  Helium has two electrons about the center; it's designation is 1s2, which
means "two electrons in the 1s-orbital."  Once we reach Lithium, its electronic
configuration is 1s2 2s1, which translates to "two electrons in the 1s-orbital and one
electron in the 2s-orbital."  For any given element, use the following tables to
determine its electronic configuration, or if you're good enough, remember which
orbitals get filled first with which electrons, and you could derive the electronic
configuration for any element by yourself.