Physics · Bohr model, energy levels, hydrogen spectrum
Hydrogen atom is excited from ground state to another state with principal quant
Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be.
- A. 2
- B. 3
- C. 5
- D. 6
Step-by-step solution
When a hydrogen atom is excited from the ground state (n=1) to n=4, the possible downward transitions are: 4→3, 4→2, 4→1, 3→2, 3→1, and 2→1. The number of spectral lines is given by n(n-1)/2 = 4*3/2 = 6.
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