Q.

If first ionization potential of a hypothetical atom is 16 V, then the first excitation potential will be

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a

10.2 V

b

12 V

c

14 V

d

16 V

answer is B.

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Detailed Solution

Given,  I.P1=16eV E1=-IP1=-16eV  First excitation is 2→1 En=E1n2=-16n2 E2→1=161n12-1n22=1611-14=16×34=12eV
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If first ionization potential of a hypothetical atom is 16 V, then the first excitation potential will be