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Question
Q217) The Bohr orbit radius for the hydrogen atom (n = 1) is approximately 0.530 Å. The radius for the first excited state (n = 2) orbit is (in Å)
a) 4.77
b) 1.06
c) 0.13
d) 2.12
SOLUTION
Ground state n =1 ,First excited state n = 2
r
o
= 0.530 Å , n =2 and Z= 1
Answer:(d)