MediumPhysicshydrogen atom
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In hydrogen like ion, the energy difference between the 2nd excitation energy state and ground is 108.8 eV. The atomic number of the ion is :
A
1
B
2
C
3
D
4
Explanation
Energy difference: ΔE = 13.6Z² (1 − 1/9) = 13.6Z² × 8/9 = 108.8 ⇒ Z² = 9 ⇒ Z = 3
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