What is the energy required to excite an electron in a hydrogen atom from its ground state () to its first excited state ()?
Answer and explanation
Correct answer: C.
- Step 1: The energy of the -th state of hydrogen is .
- Step 2: For the ground state (): . For the first excited state (): .
- Step 3: The excitation energy is .
Answer
.
Why not the others: is the ionization energy from ground state to infinity; is the binding energy of the state; is the binding energy of the state.
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