CBSE Class 11-science Answered
Hydrogen atoms are excited from ground state of principal quantum number 4.Then the number of spectral lines observed will be
1)3
2)6
3)5
4)2
How to find the answer to this question? Also how can Hydrogen atom be in ground state of principal quantum no. 4? their ground state is in the n=1 shell right? How to solve such problems if any other element other that hydrogen is given?
Asked by Renuka Ganesh | 20 Jan, 2014, 07:50: PM
Expert Answer
Answer 2) 6
Solution:
The number of spectral lines corresponds to the following possible transitions:
1. n = 4 to n = 3
2. n = 4 to n = 2
3. n = 4 to n = 1
4. n = 3 to n = 2
5. n = 3 to n = 1
6. n = 2 to n = 1
For a hydrogen atom with n=1, the electron is in its ground state; if the electron is in the n=2 orbital, it is in an excited state. The total number of orbitals for a given n value is n2.
Answered by Hanisha Vyas | 27 Jan, 2014, 11:11: AM
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