Photoelectric EffectHard
Question
Which energy state of doubly ionized lithium (Li++) has the same energy as that of the ground state of hydrogen ? Given Z for lithium = 3 :
Options
A.n = 1
B.n = 2
C.n = 3
D.n = 4
Solution
En (Li2+) = E1 (H)
⇒ − 13.6
= −13.6 × 
⇒ n = 3
⇒ − 13.6
= −13.6 × ⇒ n = 3
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