The 5s subshell contains only one orbital.
To explain further, subshells are determined by the principal quantum number (n) and the angular momentum quantum number (l). For the s subshell, the value of l is 0. This means there is only one type of orbital (the s orbital) regardless of the principal quantum level. Therefore, in the case of the 5s subshell, there’s just a single 5s orbital that can hold a maximum of two electrons.