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The hydrogen-like species Li 2 + is with one radial node in a spherically symmetric state S 1 . On absorbing the light ion will undergo a transition from state S 1 to a state S 2 . The state S 2 has one radial node and its energy is equal to the ground state energy of the hydrogen atom. The state S 1 will be

Options

  1. A1 s
  2. B2 s
  3. C2 p
  4. D3 s

Correct answer

B. 2 s

Step-by-step solution

(S 1 ) Initial spherically symmetrical state with one radial node = 2s (S 2 ) 2p has no radial node it must be 3p with one radial node E 3 p = - 1 3 · 6 3 2 3 2 = - 1 3 · 6 ev = E 1 H S 1 is 2s orbital

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