The four quantum numbers that identify the highest energy electron in a francium, fr, atomic orbital are n, ℓ, m, and s.
There is a set of quantum numbers that is associated with the energy states of an atom. The four quantum numbers i.e. ''n, ℓ, m, and s'' describe and explains the complete and unique quantum state of a single electron in an atom which is also called its wave function or orbital so we can conclude that four quantum numbers are n, ℓ, m, and s.
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