16. Which transition of Li2* is associated with same
energy change as n = 6 to n = 4 transition in He"?
(1) n = 3 to n = 1 (2) n = 8 to n = 6
(3) n = 9 to n = 6 (4) n = 2 to n = 1
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This is because the energies of the 2nd, 4th, and the 6th orbits in He⁺ are equal to the energies of the 3rd, 6th, and the 9th orbits in Li²⁺ respectively. The corresponding transition from 9 → 6 in Balmer series of Lithium atom has the same frequency as that of 6 → 4 transitions in He+.
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