The picture above represents the Atomic Structure of the Hydrogen Atom. The nucleus is not shown as we are now just interested in what orbitals the electrons occupy as we add them to form different elements. The different Shells, Subshells and their orbitals are represented by different colored rectangles at the left of the picture with increasing energy levels from bottom to top.
As we have discussed above, Hydrogen is the simplest element and is made of one proton and one electron which occupies the s-orbital of the first shell represented in the picture above as yellow. Shell #1 is small and only has one s-orbital and no p-orbitals.
Hydrogen has one proton and one electron which gives it an Atomic Number (Z) of 1.
