The energy level diagram for an hydrogen like atom is shown in the figure. The radius of its first Bohr orbit is
Text Solution
Verified by ExpertsThe correct answer is:
A
We know that 
and 
Here for n =1, E 1 = – 54.4 eV
Therefore 
⇒ ⇒ Z = 2
Hence radius of first Bohr orbit 
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