Final answer:
A single hydrogen atom has one electron in its Lewis dot structure, as hydrogen has only one valence electron.
Step-by-step explanation:
The total number of electrons present in the Lewis dot structure of an individual hydrogen atom (H) is one. This is because hydrogen is in group 1 and has one valence electron, which is represented as a single dot next to the symbol for hydrogen (H). The Lewis dot structure is a way of representing the valence electrons around an atom, and since hydrogen has only one valence electron, the structure for a single hydrogen atom is simply represented by the chemical symbol H followed by one dot.