# What is Z_"atomic number" for hydrogen?

For ""^1H, $Z$, the atomic number $=$ $1$.
$Z$ defines the number of massive, positively charged, nuclear particles, and thus determines the identity of the element: $Z = 1$, hydrogen, $Z = 2$, helium.........$Z = 23$, vanadium.
Most hydrogen nuclei have no neutrons in their nuclei, i.e. the ""^2H, ""^3H isotopes are rare, and thus there are no neutrons in ""^1H. IF there is one positive charge in the nucleus, the NEUTRAL element must contain 1 electron, which is conceived to whizz about the nucleus. Why must there be 1 electron in the neutral element?