When a hydrogen electron is in its first excited state, its principal quantum number is
A) zero.
B) 2.
C) -13.60 eV.
D) 1.

Name: When a hydrogen electron is in its first excited state, its principal quantum number is A) zero. B) 2. C) -13.60 eV. D) 1.
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Question

Quizplus · Accepted Answer

The principal quantum number, denoted by n, specifies the energy level of an electron in an atom. The first excited state means the electron has moved from the ground state (n=1) to the next higher energy level, which is n=2.

When a Hydrogen Electron Is in Its First Excited State