Question
Question: The photon radiated from hydrogen corresponding to 2<sup>nd</sup> line of Lyman series is absorbed b...
The photon radiated from hydrogen corresponding to 2nd line of Lyman series is absorbed by a hydrogen-like atom 'X' in 2nd excited state. As a result Then, the hydrogen-like atom 'X' makes a transition of nth orbit –
A
X = He+, n = 4
B
X = Li++, n = 6
C
X = He+, n = 6
D
X = Li++, n = 9
Answer
X = Li++, n = 9
Explanation
Solution
Energy of nth orbit in H-atom is same as energy of 3nth state in Li++
**\**3 ® 1 transition in H-atom would give same energy as the 3 × 3 ® 1× 3 = 9 ® 3
transition in Li++